Skocz do pozycji: 1.

Tytuł:

Structural Characterization of Some Table Salt Samples by XRD, ICP, FTIR and XRF Techniques

Autorzy:

Yalçin, Ş.
Mutlu, İ.

Powiązania:

https://bibliotekanauki.pl/articles/1490744.pdf

Data publikacji:

2012-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp

Opis:

In this study, we have investigated structure and impurities of six different salts which have a great importance in our everyday life, namely source salt, Himalayan salt, rock salt, sea salt, lake salt and reduced sodium salt (minsalt) by means of different analytical methods, namely X-ray powder diffraction, scanning electron microscope-energy dispersive X-ray spectroscopy, inductive coupling plasma optic emission spectroscopy, X-ray fluorescence spectrometer and the Fourier transform infrared spectroscopy. With the light of obtained results, suitability and performance of the different analytical methods were discussed in some details.

Źródło:

Acta Physica Polonica A; 2012, 121, 1; 50-52
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Application of different computational environments to optimization of makespan in the flow production line

Autorzy:

Sitek, P.
Wikarek, J.

Powiązania:

https://bibliotekanauki.pl/articles/118201.pdf

Data publikacji:

2005

Wydawca:

Polskie Towarzystwo Promocji Wiedzy

Tematy:

CP
CLP
CCP
scheduling

Opis:

A mathematical model of makespan optimization in the divided flow production line is presented. The methodology of Constraint Programming and Integer Programming to optimization of makespan in the above environment have been considered. Multiple examples illustrate the concept proposed

Źródło:

Applied Computer Science; 2005, 1, 1; 220-239
1895-3735

Pojawia się w:

Applied Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

The Best Model of LASSO With The LARS (Least Angle Regression and Shrinkage) Algorithm Using Mallow’s Cp

Autorzy:

Januaviani, Trisha Magdalena Adelheid
Gusriani, Nurul
Joebaedi, Khafsah
Supian, Sudradjat
Subiyanto, Subiyanto

Powiązania:

https://bibliotekanauki.pl/articles/1076395.pdf

Data publikacji:

2019

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Cp Mallows
LARS
LASSO
Multicollinearity

Opis:

Multicollinearity often occurs in regression analysis. Multicollinearity is a condition of correlation between independent variables which is a problem. One method that can overcome multicollinearity is the LASSO (Least Absolute Shrinkage and Selection Operator) method. LASSO is able to help to shrink multicollinearity and improve the accuracy of linear regression models. Estimators of LASSO parameters can be solved by the LARS (Least Angle Regression and Shrinkage) algorithm by algorithm which calculates the correlation vector, the largest absolute correlation value, equiangular vector, inner product vector, and determines the LARS algorithm limiter for LASSO. Selecting the best model using the Mallow’s C_p statistics. The smallest Mallow’s C_p value will be selected as the best model. LASSO method with a more detailed procedure with LARS algorithm and selecting the best model using the Mallow’s C_p statistics is discussed in this paper.

Źródło:

World Scientific News; 2019, 116; 245-252
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Analysis of rubber forming process of fire barrier from titanium CP2 alloy for AW 139 helicopter

Autorzy:

Krakowski, M.
Bartnicki, J.

Powiązania:

https://bibliotekanauki.pl/articles/101987.pdf

Data publikacji:

2015

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

titanium CP2
rubber forming

Opis:

This paper presents conditions of forming products from titanium sheets by means of rubber stamping method. After introducing the issues connected with these elements manufacturing for aviation industry, considering standards and legal regulations, technological problems occurring during forming deep stiffening ribs. The results in the characteristic curvatures and distortion in the final products were generated in the process heterogeneous internal stress state. The Authors aimed at explaining and presenting of solutions limiting occurrence of chosen shape faults, which disqualify these products application in aviation industry. The proposed solutions significantly reduced the incidence of these unfavorable phenomena. The modified method of rubber stamping of firewall from titanium alloy CP-2 sheet was successfully implemented in manufacturing conditions of PZL Swidnik.

Źródło:

Advances in Science and Technology. Research Journal; 2015, 9, 26; 66-71
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Fast model for phase transformations during cooling of pre-annealed multiphase steels
Szybkie modele przemian fazowych podczas chłodzenia wstępnie wyżarzonych stali wielofazowych

Autorzy:

Szeliga, Danuta
Kuziak, Roman
Zalecki, Władysław
Pidvysotskyy, Valeriy
Chang, Yuling
Bleck, Wolfgang
Bachniak, Daniel
Pietrzyk, Maciej

Powiązania:

https://bibliotekanauki.pl/articles/29520329.pdf

Data publikacji:

2019

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

CP steel
phase transformations
mean field models
stal CP
przemiany fazowe
średnie modele pola

Opis:

A thorough experimental and numerical analysis of phase transformations in a selected CP800 steel was the general objective of the paper. Dilatometric tests were performed for a wide range of cooling rates. Two models based on a mean field approach were considered. The first was an upgrade of the Johnson-Mehl-Avrami-Kolmogorov equation. The second model was based on the Leblond equation. Both models were identified using inverse analysis of the experimental data. Simulations of various cooling schedules were performed to validate the models. Phase compositions for these cooling schedules were determined. Following this the effect of elements' segregation during solidification of steel on the occurrence of marteniste/bainite bands was accounted for using the developed models.
W artykule opisano doświadczalną i numeryczną analizę przemian fazowych w wybranej stali o podwyższonej wytrzymałości. Próby dylatometryczne wykonano w szerokim zakresie prędkości chłodzenia. Rozważono dwa modele wykorzystujące metodę średniego pola. Pierwszym modelem była zmodernizowana wersja modelu JMAK (Johnson-Mehl-Avrami-Kolmogorov). Drugim modelem było rozwinięcie równania Leblonda. Przeprowadzono identyfikację modeli wykorzystując rozwiązanie odwrotne dla prób dylatometrycznych. W celu walidacji modeli wykonano symulacje różnych schematów chłodzenia. Wyznaczono skład fazowy dla tych schematów. Następnie oszacowano wahania składu chemicznego w badanej stali i wykorzystano opracowane modele do określenie wpływu segregacji pierwiastków podczas krzepnięcia stali na powstawanie pasm martenzytu/bainitu.

Źródło:

Computer Methods in Materials Science; 2019, 19, 4; 150-161
2720-4081
2720-3948

Pojawia się w:

Computer Methods in Materials Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Isobaric Thermal Expansion and Isothermal Compression of Powdered NiFe Based Alloys Studied by In-Situ EDXRD

Autorzy:

Olekšáková, D.
Füzer, J.
Kollár, P.
Bednarčík, J.
Lathe, C.

Powiązania:

https://bibliotekanauki.pl/articles/1200812.pdf

Data publikacji:

2014-07

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

75.50.Bb
61.05.cp

Opis:

The aim of the present work was to study the isothermal compression and isobaric thermal expansion behaviour of ball-milled NiFe (81 wt.% of Ni) and NiFeMo (79 wt.% of Ni, 16 wt.% of Fe) alloy and follow its phase evolution when exposed to high pressure and temperature. In-situ pressure-temperature energy dispersive X-ray (EDXRD) diffraction experiments were performed at the MAX80 instrument (beamline F2.1). The compressibility of NiFe alloy at 400 °C was evaluated for pressure values of up to 3.5 GPa. The EDXRD spectra revealed the presence of cubic FeNi_{3} phase as determined from the shift of (111), (200) and (220) reflection lines in corresponding EDXRD spectra.

Źródło:

Acta Physica Polonica A; 2014, 126, 1; 128-129
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

The quantitative dependence of reducibility on mineralogical composition in iron ore sinters (blast furnace sinters)

Autorzy:

Krztoń, H.
Stecko, J.
Kania, Z.

Powiązania:

https://bibliotekanauki.pl/articles/1058082.pdf

Data publikacji:

2016-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
89.20.Bb

Opis:

Reducibility is a parameter which describes the ability of oxygen, combined with iron, to be removed from iron ore sinters by a reducing gas used in a blast furnace, and is often characterized by a Fe²⁺ content in a sinter. In sinters, iron at Fe²⁺ valence can occur in various types of minerals, which differ in values of reducibility. The set of sinters with the reducibility from 0.63%/min to 1.49%/min, prepared in the different laboratory conditions, were examined in terms of their mineral composition. The quantitative dependences between the fractions of the individual mineral constituents of the sinters and the values of reducibility were sought. The increase of the reducibility was correlated with a decrease of the content of magnetite and a rise of the fraction of hematite.

Źródło:

Acta Physica Polonica A; 2016, 130, 4; 1147-1150
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Thin layers XRD study technique on an example of cobalt tetrafluoro phthalocyanine

Autorzy:

Sukhikh, A.
Basova, T.
Gromilov, S.

Powiązania:

https://bibliotekanauki.pl/articles/1075647.pdf

Data publikacji:

2016-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
68.55.Nq

Opis:

Thin layers X-ray diffraction study technique utilizing single-crystal X-ray diffractometer equipped with microfocus X-ray tube is described. It is shown that the layers of the tetra-fluorinated cobalt phthalocyanine (CoPcF₄), deposited by thermal evaporation in vacuum on a polished surface of the substrate (glass, quartz), have a highly oriented polycrystalline structure. All the crystallites have the (00l) plane oriented along the surface of the substrate. CoPcF₄ X-ray diffraction pattern indexing was conducted and unit cell parameters were determined. It is shown that crystal phase of both polycrystalline powder and thin layers of CoPcF₄ are isostructural to that of α -CoPc.

Źródło:

Acta Physica Polonica A; 2016, 130, 4; 889-891
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Growth and Characterization of Wide-Gap $Cd_{1-x}Zn_{x}Se$ Ternary Alloys by Using Electron Beam Evaporation Technique

Autorzy:

Suthagar, J.
Rajesh, S.
Perumal, K.
Balasubramaniam, T.
Suthan Kissinger, N.

Powiązania:

https://bibliotekanauki.pl/articles/1538742.pdf

Data publikacji:

2010-03

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

71.55.Gs
61.05.cp

Opis:

$Cd_{1-x}Zn_{x}Se$ films with different zinc content were deposited by electron beam evaporation technique onto glass substrates for the application of solid-state photovoltaic devices. The structural, surface morphological and optical properties of $Cd_{1-x}Zn_{x}Se$ films have been studied in the present work. The host material, $Cd_{1-x}Zn_{x}Se$, has been prepared by the physical vapor deposition method of electron beam evaporation technique under the pressure of 1 × $10^{-5}$ mbar. The X-ray diffractogram indicates that these alloy films are polycrystalline in nature, of hexagonal structure with strong preferential orientation of the crystallites along (002) direction. Linear variation of lattice constant with composition (x) is observed. Surface roughness measured by atomic force microscopy is used to estimate the interface roughness. The optical properties show that the band gap $(E_{g})$ values vary from 2.08 to 2.64 eV as zinc content varies from 0.2 to 0.8. The surface morphological studies show the very small, fine and hardly distinguishable grains smeared all over the surface. The material properties would be altered and excellently controlled by adiusting the system composition x.

Źródło:

Acta Physica Polonica A; 2010, 117, 3; 506-511
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Angular Distribution of N-Doped Carbon Nanotubes in Alumina Membrane Channels: A High-Energy X-ray Diffraction Study

Autorzy:

Hawelek, L.
Brodka, A.
Dore, J.
Honkimäki, V.
Kyotani, T.
Yang, Q.
Burian, A.

Powiązania:

https://bibliotekanauki.pl/articles/1538877.pdf

Data publikacji:

2010-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
61.48.De

Opis:

An alignment study of multi-wall N-doped carbon nanotubes prepared by a template pyrolytic carbon deposition method inside channels of an alumina membrane has been performed using high-energy X-ray diffraction on the ID15B beamline at the European Synchrotron Radiation Facility (ESRF, Grenoble). The two-dimensional diffraction pattern of the deposited carbon nanotubes, recorded directly, within the alumina membrane, using an image plate detector, exhibits two non-continuous arcs corresponding to the 002 graphitic reflection. The following values of the angle between the axis of the carbon nanotubes lying along the membrane channels and the incident beam were taken for five positions: 0°, 30°, 45°, 60° and 90°. The anisotropic scattering distribution of the two-dimensional patterns indicates an orientational alignment of the nanotubes. The one-dimensional intensity patterns obtained by scanning around the circumference of the (0 0 2) ring have allowed an estimation of the angular distribution of the nanotubes axes.

Źródło:

Acta Physica Polonica A; 2010, 117, 2; 302-306
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Effect of Cu Negative Ion Implantation on Physical Properties of $Zn_{1-x}Mn_xTe$ Films

Autorzy:

Pogrebnjak, A.
Shypylenko, A.
Amekura, H.
Takeda, Y.
Opanasyuk, A.
Kurbatov, D.
Kolotova, I.
Klymov, O.
Kozak, C.

Powiązania:

https://bibliotekanauki.pl/articles/1400485.pdf

Data publikacji:

2013-05

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
61.72.uj

Opis:

The paper deals with the investigations of structural properties of $Zn_{1-x}Mn_xTe$ films, which were fabricated under various deposition conditions using the thermal evaporation method in a closed volume. The surface morphology of the samples was studied, the phase analysis of their structures was performed, the elemental analysis of the films and the crystal lattice constant were investigated. The texture perfection of the films before and after copper ion implantation was evaluated.

Źródło:

Acta Physica Polonica A; 2013, 123, 5; 939-942
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Isostructural Transition in RTAl Compounds at High Temperatures

Autorzy:

Prchal, J.
Javorský, P.
de Boer, F.
Moleman, A.

Powiązania:

https://bibliotekanauki.pl/articles/1813676.pdf

Data publikacji:

2008-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.50.Ks
61.05.cp

Opis:

Based on previously discovered forbidden values of the c/a ratio, we studied anomalies in the temperature evolution of the lattice parameters (a, c) of several hexagonal RTAl compounds at high temperatures (above room temperature). The compound $ErNi_{0.45}Cu_{0.55}Al$, that seemed to be impossible to be prepared in single-phase form, reaches the single-phase state at temperatures above 493 K (220°C). On the other hand, the compound $TbNi_{0.7}Cu_{0.3}Al$ - that was expected to undergo a first-order structural phase transition at high temperatures - exhibits a second-order type transition when approaching the critical values of the c/a ratio. These results are in agreement with idea of a forbidden range of c/a values in these compounds.

Źródło:

Acta Physica Polonica A; 2008, 113, 1; 335-338
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Synthesis and Structure Characterisation of Micro-and Nanocrystalline Powders of Dy_{1-x}R_xFeO₃ (R = La, Pr, Nd, Sm, Gd)

Autorzy:

Pavlovska, O.
Lutsyuk, I.
Kondyr, A.
Zhydachevskyy, Ya.
Vakhula, Ya.
Pieniążek, A.
Vasylechko, L.

Powiązania:

https://bibliotekanauki.pl/articles/1029717.pdf

Data publikacji:

2018-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.66.Fn
61.05.cp

Opis:

This work deals with the study of the phase and crystal structure behaviour of new micro- and nanocrystalline ferrites Dy_{1-x}R_xFeO₃ obtained by solid state reactions (R = La, Pr) and sol-gel citrate (R = Nd, Sm, Gd) techniques. It was established that all synthesized samples adopt orthorhombic perovskite structure isotypic with GdFeO₃. Unit cell dimensions and atomic coordinates of the mixed rare earth ferrites derived by full profile Rietveld refinement technique agree well with the data of the "pure" DyFeO₃ and RFeO₃ compounds, thus proving formation of continuous solid solutions Dy_{1-x}R_xFeO₃ in the DyFeO₃-RFeO₃ systems (R = La, Pr, Nd, Sm, Gd). Peculiarity of the Dy_{1-x}La_xFeO₃ series is the lattice parameters crossover and formation of dimensionally tetragonal structure at x ≈0.97.

Źródło:

Acta Physica Polonica A; 2018, 133, 4; 802-805
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

The law of growth of nitrided layer in 31CrMoV9 steel

Autorzy:

Syla, N.
Aliaj, F.
Dalipi, B.

Powiązania:

https://bibliotekanauki.pl/articles/1068250.pdf

Data publikacji:

2016-07

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
81.65.Lp

Opis:

The law of growth of nitrided layers produced by gaseous nitriding of 31CrMoV9 alloy steel at different process parameters is described. 31CrMoV9 steel specimens were subjected to nitriding process in ammonia gas at three different temperatures: 510, 550 and 590°C, and for each temperature four different nitriding times were used. This way twelve specimens were produced. Nitrided specimens were investigated with optical microscopy, electron probe micro-analysis and x-ray diffraction. The nitrogen depth concentration profiles, deduced from electron probe micro-analysis, in conjunction with results of optical microscopy, were used to determine the thickness of the nitrided layers, i.e. the diffusion depth of nitrogen. From the dependence of the nitrided layer thickness on process parameters (temperature and time) it was possible to deduce the law that governs the growth of the nitrided layer for 31CrMoV9 alloy steel. Through this law, then, it is possible to predetermine the layer thickness for every real process parameter in nitriding of 31CrMoV9 steel, which is very important for technological applications.

Źródło:

Acta Physica Polonica A; 2016, 130, 1; 83-86
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Crystal perfection studies of single crystal superalloy turbine blades by X-ray diffraction methods

Autorzy:

Gancarczyk, K.
Albrecht, R.
Bogdanowicz, W.
Sieniawski, J.

Powiązania:

https://bibliotekanauki.pl/articles/1112679.pdf

Data publikacji:

2016-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.66.Dk
61.05.cp

Opis:

In the paper the crystal structure of single crystal CMSX-4 blade casts, applied in high pressure turbine of aircraft engines was analyzed. The longitudinal section of blade, cast at withdrawal rate of 3 mm/min was used as a sample. During the conducted research, following X-ray diffraction methods were applied: EFG Ω-scan, Auleytner X-ray topography and analysis of diffraction reflex profile ("rocking curve"). The authors determined crystal orientation in entire blade casts on the basis of set criterion concerning values of angle α - deviation of [001] direction from the direction of cast withdrawal. Conclusions concerning the crystal structure quality of the blade were drawn based on results from three different research methods. Local changes in crystal orientation on the surface of blade cast, also areas with significant structure defect degree and the presence of internal stresses were characterized.

Źródło:

Acta Physica Polonica A; 2016, 130, 4; 1088-1090
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Study of Ultrasonically Sprayed ZnO Films: Thermal Annealing Effect

Autorzy:

Ozutok, F.
Demirselcuk, B.
Sarica, E.
Turkyilmaz, S.
Bilgin, V.

Powiązania:

https://bibliotekanauki.pl/articles/1490746.pdf

Data publikacji:

2012-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

78.20.Ci
61.05.cp

Opis:

ZnO thin films were deposited on microscope glass substrates by ultrasonic spray pyrolysis technique. The effects of annealing under various temperatures on the optical and structural properties of ZnO thin films were analyzed. The as-deposited and annealed ZnO thin films were investigated by UV/VIS spectrophotometer and X-ray diffractometer. Some of the optical properties of the films such as transmittance, absorbance and band gap energy were investigated by UV/VIS spectrophotometer. The crystallinity levels of the films were investigated, the structural parameters such as diffraction angle, full-width at half maximum, lattice parameters, grain size and dislocation density were calculated and structural properties were analyzed. X-ray diffraction patterns indicated that the ZnO films had a polycrystalline hexagonal wurtzite structure.

Źródło:

Acta Physica Polonica A; 2012, 121, 1; 53-55
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Specific Heat Study of $PrNi_4Si$

Autorzy:

Procházková, K.
Daniš, S.
Svoboda, P.

Powiązania:

https://bibliotekanauki.pl/articles/1813660.pdf

Data publikacji:

2008-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
75.50.-y

Opis:

Here we present the results of pilot polycrystalline study of $PrNi_4Si$. The X-ray study did not confirm the expected $CaCu_5$-type structure. Instead of this, the orthorhombic structure with the space group Cmmm was found. The zero-field specific heat was measured in the temperature range 2-300 K. The data were analyzed using the sum of the phonon, electronic, and magnetic contributions to specific heat, respectively. The magnetic part of the specific heat can be well described using the Schottky formula for the 9 crystal-field singlet levels of the pz3 H4 ground-state multiplet of the $Pr^{3+}$ ion.

Źródło:

Acta Physica Polonica A; 2008, 113, 1; 299-302
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

On the Crystal and Magnetic Behavior οf $ScFe_{4}Al_{8}$ Single Crystal

Autorzy:

Rećko, K.
Dobrzyński, L.
Lemée-Cailleau, M.
Waliszewski, J.
Talik, E.
Suski, W.
Courtois, P.

Powiązania:

https://bibliotekanauki.pl/articles/1810469.pdf

Data publikacji:

2009-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.fm
61.05.cp

Opis:

Nuclear and magnetic properties of the $ScFe_{4}Al_{8}$ single crystal were found to exhibit unparalleled complexity of nuclear and magnetic structures. Our previous neutron measurements revealed presence of two modulation vectors, both along [ε, ε, 0], however with different critical temperatures. Recent experiments forced us to revise our knowledge of the structural ordering in the sample. So far, the crystal structure of this alloy, being of $ThMn_{12}$-type, has never been questioned.

Źródło:

Acta Physica Polonica A; 2009, 115, 1; 206-208
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

The Structural Stability of Soft Magnetic Fe-Co-Zr-W-B Metallic Glasses Investigated by the in-situ X-ray Diffraction

Autorzy:

Michalik, S.
Bednarcik, J.
Pawlik, P.
Matija, R.
Sovak, P.

Powiązania:

https://bibliotekanauki.pl/articles/1366893.pdf

Data publikacji:

2014-07

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
61.43.Dq

Opis:

The atomic structure of as-prepared $Fe_{61}Co_{(14-x)}Zr_{5}W_{x}B_{20}$ (x=1, 2 and 4) ribbon samples and their thermal stability were investigated by in-situ high-energy X-ray diffraction experiments. It was observed that higher W concentration causes the tiny shift of the main peak of the reduced atomic pair distribution function to higher values of interatomic distances and increases the coefficient of volume thermal expansion. The crystallization process occurs in two steps and is qualitatively the same for all studied specimens. Firstly the $Fe_{23}B_{6}$ phase is created and later is transformed to other types of borides together with the creation of a Fe-based phase.

Źródło:

Acta Physica Polonica A; 2014, 126, 1; 66-67
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Znaczenie aktywności proteazy kapsydowej CP w rozwoju infekcji alfawirusowych
The role of capsid protease CP activity in the development of alphaviral infections

Autorzy:

Torzyk, Karolina
Skoreński, Marcin
Sieńczyk, Marcin

Powiązania:

https://bibliotekanauki.pl/articles/2200548.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Chemiczne

Tematy:

alfawirusy
arbowirusy
proteazy serynowe
proteaza kapsydowa CP
inhibitory
alphaviruses
arboviruses
serine proteases
capsid protease CP
inhibitors

Opis:

Alphaviruses belong to the worldwide distributed Togaviridae family and Alphavirus genus. They are spherical, enveloped, single-stranded RNA arthropodborne viruses. Alphaviruses are mostly transmitted by mosquitoes (Aedes spp. and Anopheles spp.) and are geographically distributed in restricted areas where appropriate vectors are present (Fig.1.). The most recognized members of this genus are Sindbis (SINV), Semliki Forest (SFV), Venezuelan equine encephalitis (VEEV), Ross River (RRV), and Chikungunya (CHIKV) viruses. Alphaviruses are infection agents for humans and many animals. Clinically, most human infections with arthritogenic alphaviruses are associated with symptoms such as fever, headache, joint pain, rash, chronic arthritis, and encephalitis. Major events during the alphaviral infection are virus entry, replication, assembly, and budding of new virions. Alphaviral RNA encodes four nonstructural and five structural proteins. Nonstructural proteins are mainly involved in the replication process and virus pathogenesis, while structural proteins form new virions. Both groups of viral proteins are produced as single polyproteins which undergo autoproteolytic maturation. This process is carried out by the two viral proteases, cysteine protease nsP4 and C protein serine protease (CP), and is considered to be critical for virus replication. The capsid protease CP is a chymotrypsin-like serine protease with the catalytic triad including His145, Asp167, and Ser219. What is important, after a suicidal autoproteolytic event the side chain of Trp267 remains bound in a hydrophobic S1 pocket thus inhibiting further trans-proteolytic activity. Alphaviral capsid protein undergoes a single proteolytic reaction before maturation and then, after selfinactivation, it assembles to form a viral capsid shell. Inhibitors of the capsid protease have significant antiviral activity. Compounds belonging to this group can be good candidates for new antiviral drugs.

Źródło:

Wiadomości Chemiczne; 2022, 76, 5-6; 309--321
0043-5104
2300-0295

Pojawia się w:

Wiadomości Chemiczne

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 21.

Tytuł:

Semantic product personalization based on the CogniPy environment

Autorzy:

Dobrowolski, Dariusz
Świątkowski, Jakub

Powiązania:

https://bibliotekanauki.pl/articles/27313487.pdf

Data publikacji:

2022

Wydawca:

Politechnika Śląska. Wydawnictwo Politechniki Śląskiej

Tematy:

ontology
semantics
CogniPy
CP Factory
ontologia
semantyka

Opis:

Purpose: The aim of the publication was to visualize the process of creating knowledge on the example of the CP Factory production line. For this purpose, the data contained in the relational databases and data of the operating production line were used. This data was converted to the form required by the CogniPy environment to create a semantic ontology for product personalization. Design/methodology/approach: With the available software based on ontologies and knowledge charts, the possibility of common human-computer reasoning has been opened, especially in production management. Findings: During the activities carried out, the on-conceptualization of the knowledge contained in the production management system was brought to an ontological form. At the moment, the information contained in the database is not very different from the data existing in the relational database. However, further modeling of ontology can be directed towards the creation of rules, logic and axioms of production processes. Practical implications: The operations and transformations performed presented the operation of CogniPy in the process of creating ontology and materializing the graph and queries. The created ontology takes the form of a universal set of knowledge that makes it open to wide integration with other systems. Originality/value: The publication shows the possibilities of using the CogniPy environment in the construction of ontology and semantic product personalization.

Źródło:

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2022, 162; 141--152
1641-3466

Pojawia się w:

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 22.

Tytuł:

The role of the ICF-CP functional diagnosis of a child with cerebral palsy during biopsychosocial rehabilitation under the Conductive Education System
Rola diagnozy funkcjonalnej ICF-CP dziecka z mózgowym porażeniem dziecięcym w procesie biopsychospołecznej rehabilitacji w Systemie Nauczania Kierowanego

Autorzy:

Nowak, Katarzyna

Powiązania:

https://bibliotekanauki.pl/articles/1798801.pdf

Data publikacji:

2015

Wydawca:

Akademia Wychowania Fizycznego im. Bronisława Czecha w Krakowie

Tematy:

Cerebral palsy (CP)
ICF-CP
Conductive Education
Rehabilitation
mózgowe porażenie dziecięce (m.p.dz.)
System Nauczania Kierowanego
rehabilitacja

Opis:

Mózgowe porażenie dziecięce to zespół objawów wynikających z trwałego uszkodzenia mózgu, znajdującego się w stadium niezakończonego rozwoju. Lokalizacja uszkodzenia mózgu warunkuje deficyty różnych funkcji, np.: ruchu, wzroku, mowy, funkcji poznawczej i emocjonalnej. Międzynarodowa Klasyfikacja Funkcjonowania, Niepełnosprawności i Zdrowia (ICF) to skala opracowana przez Światową Organizację Zdrowia (WHO), przeznaczona do opisu różnych aspektów zdrowia. ICF zapewnia standardowy język i koncepcyjne podstawy do zdefiniowania i pomiaru zdrowia i niepełnosprawności. ICF integruje najważniejsze modele niepełnosprawności. Uznaje rolę czynników środowiskowych w tworzeniu niepełnosprawności, a także znaczenie warunków zdrowotnych i ich skutków. Wieloprofilowość oraz uniwersalność klasyfikacji ICF umożliwia szerokie jej zastosowanie m.in. jako narzędzia: statystycznego, badawczego, klinicznego, polityki społecznej, edukacyjnego. Klasyfikacja ICY-CY (ICF wersja dla dzieci i młodzieży) pokazuje, że dziecko należy traktować jako istotę „międzysystemową”, ponieważ w trakcie rozwoju potrzebuje nadzoru oraz wsparcia we wszystkich aspektach życia, m.in. w sferze poznawczej, społecznej, mobilności, komunikacji, korzystając jednocześnie z kilku systemów usług, m.in. medycznych, edukacyjnych, opieki społecznej itp. Z listy 1685 kategorii ICF-CY specyficznych zestawów dla dzieci/młodzieży powstał kompletny, składający się ze 135 kategorii, specyficzny zestaw ICF-CP dla dzieci z mózgowym porażeniem dziecięcym od 0 do 18 lat. Dla ułatwienia w praktyce klinicznej ICF-CP został podzielony na mniejsze zestawy, również zależne od wieku dziecka z m.p.dz. Diagnoza funkcjonalna ICF-CP, obejmująca wszystkie aspekty życia, ułatwia wyznaczenie celów SMART oraz zaplanowania holistycznego procesu rehabilitacji. Usprawnianie ma na celu w równym stopniu oddziaływanie na naukę funkcji ruchowej, poznawczej, wychowania czy kształtowania osobowości dziecka. Funkcjonalna diagnoza pokazuje relacje rodzinne oraz wpływ środowiska na aktywne uczestnictwo dziecka. System Nauczania Kierowanego to wieloprofilowy proces, polegający na jednopłaszczyznowym, równoległym, zintegrowanym i zharmonizowanym usprawnianiu wszystkich niezbędnych funkcji dziecka z mózgowym porażeniem dziecięcym. Nadrzędnym celem wieloprofilowego usprawniania jest przejście od dysfunkcji do ortofunkcji, czyli według ICF-CP aktywnego uczestnictwa.
Cerebral palsy (CP) is a set of symptoms that result from permanent damage to an undeveloped brain. The location of the brain damage determines the deficits of different functions, which may include: movement, vision, speech, cognitive functions, and emotional functions. The International Classification of Functioning, Disability and Health (ICF) is a scale developed by the World Health Organization (WHO) that is used to describe various aspects of health. The ICF uses a common language and provides a conceptual basis for defining and measuring health and disabilities. The ICF also integrates the most important models of disabilities. It takes into account the role of environmental factors in the development of a disability and the importance of health conditions and their impact. The ICF classifications are multi-profile and universal, which allows for their wider use as a statistical, research, clinical, socio-political and educational tool. The ICF-CY (a version of the ICF for children and youth) shows that a child should be treated as an ‘intersystematic’ individual, because during development a child needs supervision and support in all aspects of life, including in the cognitive, social, mobility and communication spheres, and should take advantage of several services such as medical, educational and social care. From a list of 1685 categories in the ICF-CY, a specific set for children/adolescents with cerebral palsy (the ICFCP) was developed. This consists of 135 categories for children aged 0 to 18 years. For ease of clinical use, the ICF-CP is also divided into smaller sets that are dependent on the age of the child with CP. The ICF-CP functional diagnosis, which takes into account all aspects of life, facilitates the setting of SMART goals, as well as the planning of a holistic rehabilitation process. The aim of rehabilitation is equally aimed at motor functioning, cognition, learning and personality development. a functional diagnosis therefore shows the relationships in the family, and the effect of the environment on a child’s active participation. Conductive Education is a multi-profile process consisting of single-plane, parallel, integrated and harmonised improvement of all functions that are vital for a child with cerebral palsy. The main objective of this multi-profile rehabilitation is to progress from dysfunction to ortho-functioning, which, according to the ICF-CP, constitutes active participation.

Źródło:

Medical Rehabilitation; 2015, 19(2); 24-33
1427-9622
1896-3250

Pojawia się w:

Medical Rehabilitation

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Opracowanie modeli rozwoju mikrostruktury i kinetyki przemian fazowych w wyrobach płaskich i długich ze stali bainitycznych
Development of mathematical models of microstructure evolution and phase transformation kinetics in flat and long bainitic steel products

Autorzy:

Zalecki, W.
Opara, J.
Pidvysots'kyy, V.
Wrożyna, A.
Radwański, K.

Powiązania:

https://bibliotekanauki.pl/articles/181985.pdf

Data publikacji:

2015

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Metalurgii Żelaza im. Stanisława Staszica

Tematy:

stal DP
stal CP
przemiana fazowa
dylatometria
modelowanie matematyczne
DP steel
CP steel
phase transformation
dilatometry
mathematical modeling

Opis:

Celem pracy było opracowanie narzędzi wspomagających budowę modelu reologicznego, zmian mikrostruktury oraz przemian fazowych. Przeprowadzono badania dylatometryczne, plastometryczne oraz metalograficzne wybranych stali bainitycznych przeznaczonych na wyroby długie i płaskie. Zbudowano oprogramowanie wspomagające opracowywanie matematycznych modeli reologicznego, rozwoju mikrostruktury i przemian fazowych. Na podstawie zebranych danych doświadczalnych opracowano model reologiczny i rozwoju mikrostruktury, a także zweryfikowano działanie programu służącego do opracowania modelu przemian fazowych dla wybranych stali bainitycznych.
The aim of the work was to build computer aided tools for development of rheological, microstructure evolution and phase transformation mathematical models. Experimental studies of some bainitic steels for fl at and long products comprised: dilatometry, plastometric tests, as well as metallography. Software was built for development of mathematical models: rheological, microstructure evolution, and phase transformation. Experimental verification of the software was carried out. For selected bainitic steels rheological and microstructure evolution models were developed.

Źródło:

Prace Instytutu Metalurgii Żelaza; 2015, T. 67, nr 1, 1; 22-29
0137-9941

Pojawia się w:

Prace Instytutu Metalurgii Żelaza

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Ilościowa analiza składu fazowego w wybranych stalach konstrukcyjnych
Quantitative analysis of phases composition in some structural steels

Autorzy:

Zalecki, W.
Opara, J.
Wrożyna, A.

Powiązania:

https://bibliotekanauki.pl/articles/182195.pdf

Data publikacji:

2013

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Metalurgii Żelaza im. Stanisława Staszica

Tematy:

stal DP
stal CP
trawienie
identyfikacja faz
dylatometria
modelowanie matematyczne
DP steel
CP steel
phase identification
dilatometry
mathematical modeling
eating

Opis:

Przeprowadzono ilościową analizę składu fazowego wybranych stali konstrukcyjnych. Badania wykonano na próbkach dylatometrycznych ze stali typu DP i CP. Wyniki pomiarów stereologicznych na zgładach trawionych różnymi odczynnikami zestawiono z analizą dylatometryczną. Opracowano własny program do identyfi kacji parametrów numerycznych modeli przemian fazowych w stalach. Podjęto próbę opracowania numerycznego modelu przemian fazowych zachodzących w stali konstrukcyjnej wielofazowej z wykorzystaniem nowego oprogramowania.
Quantitative analysis of phases was carried out in some structural steels. The investigation was performed on dilatometric specimens of DP and CP steels. The results of quantitative analysis of microstructure, revealed on specimens using different etching techniques, were compared to volume fractions of phases estimated using dilatometric technique. Moreover, computer program was developed for identification of parameters of mathematical model describing phase transformations in steels. The software was applied to developed numerical model of phase transformations occurring in complex phase structural steel.

Źródło:

Prace Instytutu Metalurgii Żelaza; 2013, T. 65, nr 2, 2; 21-26
0137-9941

Pojawia się w:

Prace Instytutu Metalurgii Żelaza

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Structure of Melt-Spun Co₂MnAl Heusler Alloy

Autorzy:

Piovarči, S.
Diko, P.
Kavečanský, V.
Ryba, T.
Vargová, Z.
Varga, R.

Powiązania:

https://bibliotekanauki.pl/articles/1032646.pdf

Data publikacji:

2017-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

68.55.-a
75.50.Cc
61.05.cp

Opis:

The growth-related microstructure and texture of the Co₂MnAl-type Heusler alloy in the form of a melt-spun ribbon was studied by electron microscopy, electron backscattered diffraction and X-ray diffraction. It is shown that melt spinning produces a single-phase disordered Heusler alloy. The fine grain structure at the wheel side of the ribbon exhibits no texture, while dominant columnar grain structure formed on the free surface side exhibits the ⟨111⟩ fibre texture with a declination by about 10 degrees in the spinning direction. The dendritic growth of columnar crystals causes inhomogeneity of the chemical composition on a micrometre scale with a higher Co and Al concentration in the centre of dendritic arms and a higher concentration of Mn at the dendrite arm boundaries.

Źródło:

Acta Physica Polonica A; 2017, 131, 4; 881-883
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

The moment series expansion for quasicrystal with phason disorder

Autorzy:

Buganski, I.
Strzalka, R.
Wolny, J.

Powiązania:

https://bibliotekanauki.pl/articles/1112682.pdf

Data publikacji:

2016-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.44.Br
61.05.cp
61.43.-j

Opis:

The novel method for structural analysis of quasicrystals with phason flips is presented. The correction for diffraction peaks' intensities can be made within average unit cell approach by modification of the statistical distribution of atomic positions. Characteristic function of the distribution expanded into moment series, involving only even moments, estimates the envelope function and therefore the flip ratio can be evaluated.

Źródło:

Acta Physica Polonica A; 2016, 130, 4; 833-835
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Zinc oxide/cuprous(I) oxide-based solar cells prepared by electrodeposition

Autorzy:

Pławecki, M.
Rówiński, E.
Mieszczak, Ł.

Powiązania:

https://bibliotekanauki.pl/articles/1075675.pdf

Data publikacji:

2016-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
73.50.Pz
73.40.Sx

Opis:

The aim of this research was to fabricate zinc oxide/cuprous(I) oxide-based heterojunction solar cells with the use of electrodeposition methods, and further to investigate their structures and photovoltaic properties. The ZnO and Cu₂O were used as n- and p-type semiconductors, respectively, to fabricate photovoltaic devices based on Ag/ZnO/Cu₂O/Cu(100) heterojunction structures. The crystallite sizes of ZnO and Cu₂O were determined to be 25.4(3) nm and 69.8(6) nm, respectively. It was pointed out that efficiencies of the solar cells can be gradually adjusted, using different thicknesses of Cu₂O layers, to achieve values as high as 2.7%. The standard diode model and high device performance provide new insights into the issue, outlining guidelines for high-performance solar cells and suggesting that a metal-n-type semiconductor-p-type semiconductor nanostructure-crystal layered, sandwiched-type architecture is a promising platform: to boost the efficiency.

Źródło:

Acta Physica Polonica A; 2016, 130, 4; 1144-1146
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Magnetic Properties and Sorption Activity of Mechanically Activated Magnetite $Fe_3O_4$

Autorzy:

Baláž, P.
Timko, M.
Kováč, J.
Bujňáková, Z.
Ďurišin, J.
Myndyk, M.
Šepelák, V.

Powiązania:

https://bibliotekanauki.pl/articles/1535173.pdf

Data publikacji:

2010-11

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

75.60.Ej
61.05.cp
76.80.+y

Opis:

It is known that the action of mechanical forces on solids (mechanical activation and/or mechanochemistry) leads to changes of their properties and reactivity. We have studied the physico-chemical and sorption properties of magnetite $Fe_3O_4$ (Kiruna, Sweden) mechanically activated in a planetary mill. Several methods such as X-ray diffractometry, Mössbauer spectroscopy, magnetometry, specific surface area measurement as well as arsenic sorption tests have been applied. By X-ray diffractometry strong amorphisation of magnetite has been evidenced. In parallel, specific surface area increased from 0.1 $m^2//g$ for the reference (non-milled) sample to the values 0.5-6.1 $m^2//g$ for milled samples. The Mössbauer spectrum of the reference sample is well fitted with two subspectra corresponding to tetrahedrally (A) and octahedrally (B) coordinated iron cations in the spinel structure of $Fe_3O_4$. In mechanically activated samples (B)-site subspectrum becomes asymmetric, while (A)-site spectrum remains more or less unchanged. The more covalent character of the Fe(A)-O bond compared to the Fe(B)-O bond can explain qualitatively why the spin-density transfer from (A) to (B) in the spinel structure is more effective than vice versa. The value of the saturation magnetization at room temperature was 67.4 ≈ 43.6 emu/g which is significantly lower than that of the bulk particles 92 emu/g. This reduction may be attributed to the surface disorder or spin canting at the particle surface. During the milling process the coercivity value increases from 150 Oe up to 460 Oe with milling time. This increase can be related to the fact that magnetic anisotropy may increase when particle size decreases. The sorption activity of $Fe_3O_4$ was enhanced as a consequence of its disordering: 88% of $As^{3+}$ was captured for the mechanically activated sample in comparison with 0% for the non-milled one.

Źródło:

Acta Physica Polonica A; 2010, 118, 5; 1005-1007
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Characterization of n-ZnO/p-GaN Heterojunction for Optoelectronic Applications

Autorzy:

Wachnicki, L.
Gieraltowska, S.
Witkowski, B.
Figge, S.
Hommel, D.
Guziewicz, E.
Godlewski, M.

Powiązania:

https://bibliotekanauki.pl/articles/1399138.pdf

Data publikacji:

2013-11

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

85.30.Kk
61.05.cp
81.05.Dz

Opis:

An important feature of zinc oxide and gallium nitride materials are their similar physical properties. This allows to use them as a p-n junction materials for applications in optoelectronics. In earlier work we presented use of ZnO as a transparent contact to GaN, which may improve external efficiency of LED devices. In this work we discuss properties of a n-ZnO/p-GaN heterostructure and discuss its optimization. The heterostructure is investigated by us for possible applications, e.g. in a new generation of UV LEDs or UV light detectors.

Źródło:

Acta Physica Polonica A; 2013, 124, 5; 869-872
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Validity of Swanepoels Method for Calculating the Optical Constants of Thick Films

Autorzy:

Shaaban, E.
Yahia, I.
El-Metwally, E.

Powiązania:

https://bibliotekanauki.pl/articles/1489840.pdf

Data publikacji:

2012-03

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

68.35.bj
61.05.cp
78.20.Ci

Opis:

Optical constants, dispersion and oscillator parameters of different thicknesses of amorphous $Ge_{25}Cd_5Se_{70}$ films have been deposited onto glass substrates using thermal evaporation technique. The optical constants have been investigated by optical spectrophotometry measurements. The straight forward analysis proposed by Swanepoel, which is based on the use of the extremes of the interference fringes has been used in order to derive the refractive index and the film thickness in μm range. The refractive index could be extrapolated by the Cauchy dispersion relationship over the whole spectral range, which extended from 400 to 2500 nm. It is observed that, refractive index n increases with the film thickness. The possible optical transition is found to be allowed indirect transition with energy gap increase from 1.915 to 1.975 eV with increasing film thickness. The dispersion of the refractive index is discussed in terms of the Wemple-DiDomenico single oscillator model. The interband oscillator wavelength, the average oscillator strength, and the optical conductivity were estimated for different thicknesses of amorphous $Ge_{25}Cd_5Se_{70}$ films.

Źródło:

Acta Physica Polonica A; 2012, 121, 3; 628-635
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Deposition and Characterization of CdS, CuS and ZnS Thin Films Deposited by SILAR Method

Autorzy:

Guzeldir, B.
Saglam, M.
Ates, A.

Powiązania:

https://bibliotekanauki.pl/articles/1490738.pdf

Data publikacji:

2012-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.-a
61.05.cp
61.72.uj

Opis:

Cadmium sulfide, copper sulfide and zinc sulfide films were grown on Si(111) substrate by successive ionic layer adsorption and reaction method at room temperature. The crystalline structure and morphology of obtained films were characterized by X-ray diffraction, scanning electronic microscope and energy dispersive X-ray analysis methods. The films were polycrystalline and showed preferred orientation. The surface morphology of these films looked relatively smooth and homogeneous in the scanning electron microscope image. The energy dispersive X-ray analysis spectra showed that the expected elements exist in the thin films.

Źródło:

Acta Physica Polonica A; 2012, 121, 1; 33-35
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Epitaxial ZnO Films Grown at Low Temperature for Novel Electronic Application

Autorzy:

Wachnicki, Ł.
Dużyńska, A.
Domagala, J.
Witkowski, B.
Krajewski, T.
Przeździecka, E.
Guziewicz, M.
Wierzbicka, A.
Kopalko, K.
Figge, S.
Hommel, D.
Godlewski, M.
Guziewicz, E.

Powiązania:

https://bibliotekanauki.pl/articles/1492723.pdf

Data publikacji:

2011-12

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.15.Aa
61.05.cp
81.05.Dz

Opis:

Monocrystalline films of zinc oxide were grown at 300C by atomic layer deposition. ZnO layers were grown on various substrates like ZnO bulk crystal, GaN, SiC and $Al_2O_3$. Electrical properties of the films depend on structural quality. Structural quality, surface morphology and optical properties of ZnO films were characterized using X-ray diffraction, scanning electron microscopy, and photoluminescence, respectively. High resolution X-ray diffraction spectra show that the rocking curve FWHM of the symmetrical 00.2 reflection equals to 0.058° and 0.009° for ZnO deposited on a gallium nitride template and a zinc oxide substrate, respectively. In low temperature photoluminescence sharp excitonic lines in the band-edge region with a FWHM equal to 4 meV, 5 meV and 6 meV, for zinc oxide deposited on gallium nitride, zinc oxide and sapphire substrate, respectively.

Źródło:

Acta Physica Polonica A; 2011, 120, 6A; A-007-A-010
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Crystalline Structures of Some High Entropy Alloys Obtained by Neutron and X-Ray Diffraction

Autorzy:

Dahlborg, U.
Cornide, J.
Calvo-Dahlborg, M.
Hansen, T.
Leong, Z.
Asensio Dominguez, L.
Chambreland, S.
Cunliffe, A.
Goodall, R.
Todd, I.

Powiązania:

https://bibliotekanauki.pl/articles/1402077.pdf

Data publikacji:

2015-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
61.05.fm
61.66.Dk

Opis:

The understanding of the structure and the stability of high entropy alloys is still incomplete and the mechanisms behind the composition-property relationships are unclear. One reason is that few systematic and accurate determinations of their composition-dependent structure on atomic level have been made. In this paper some results on the structure obtained by X-ray and neutron diffraction of the CoCrFeNi alloy, to which Pd, Sn and Cu have been added in different amounts, are reported. The investigations make it obvious that none of the alloys is completely homogeneous, as has earlier been suggested, and that they do not form a perfect solid solution.

Źródło:

Acta Physica Polonica A; 2015, 128, 4; 552-556
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Magnetocaloric Effect in Nanostructured $Pr_2Fe_{17}$ and $Nd_2Fe_{17}$ Synthesized by High-Energy Ball-Milling

Autorzy:

Alvarez, P.
Sánchez-Marcos, J.
Sanchez Llamazares, J.
Franco, V.
Reiffers, M.
Blanco, J.
Gorria, P.

Powiązania:

https://bibliotekanauki.pl/articles/1534200.pdf

Data publikacji:

2010-11

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
75.50.Tt
75.30.Kz

Opis:

Nanocrystalline $Pr_2Fe_{17}$ and $Nd_2Fe_{17}$ powders with rhombohedral $Th_2Zn_{17}$-type crystal structure and average particle sizes around 20 nm have been obtained by high-energy ball milling. While the bulk alloys show a well-defined and sharp drop in the low-field magnetization curve at the Curie temperature, $T_{C}$ = 285 K (Pr) and 335 K (Nd), the ball-milled samples exhibit a substantial broadening of the ferro-to-paramagnetic transition due to a considerable augmentation of the disordered inter-grain boundaries. The latter results in an increase of more than 25% in the values of the full width at half maximum of the temperature dependence of the magnetic entropy change maintaining almost unchanged the relative cooling power.

Źródło:

Acta Physica Polonica A; 2010, 118, 5; 867-869
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Mechanical Alloying of $Al_{73}Cu_{11}Cr_{16}$ Alloy from Ion Irradiated Powders

Autorzy:

Medvedeva, E.
Tcherdyntsev, V.
Makhin'ko, F.
Gushchina, N.
Ovchinnikov, V.

Powiązania:

https://bibliotekanauki.pl/articles/1375515.pdf

Data publikacji:

2014-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.44.Br
61.05.cp
81.20.Ev

Opis:

$Al_{73}Cu_{11}Cr_{16}$ alloys were prepared by mechanical alloying of the irradiated by $Ar^{+}$ ions elemental powders. Evolution of alloy structure at ball milling, as well as during the further annealing, was investigated using X-ray diffraction and differential scanning calorimetry. It was shown that ball milling leads to the Cu dissolution in Al and Cr and to the formation of $Al_{2}Cu$ intermetallic phase. An increase of the milling duration leads to an increase of the $Al_{2}Cu$ phase content in the samples. Ion irradiation of initial elemental powders results in an increase of their interaction rate at milling. In the case of irradiated powders using as initial materials, a content of $Al_{2}Cu$ phase after milling is higher than in the case of using non-irradiated elemental powders. No effect of irradiation of initial elemental powders on the phase transformation at heating was observed. The annealing results in the decomposition of Al- and Cr-based supersaturated solid solutions. An increase in the $Al_{2}Cu$ phase content at heating was observed only in the samples, which were milled for 4 h. In the samples milled for 14 h, nearly no increase in $Al_{2}Cu$ phase content at heating was observed. Heating up to 500-600°C results in the single-phase decagonal quasicrystalline phase formation for all of the studied samples.

Źródło:

Acta Physica Polonica A; 2014, 126, 4; 979-983
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Effect of Annealing Time on Structure of $Fe_{72.5}Cu_{1}Nb_{2}Mo_{2}Si_{15.5}B_{7}$ Alloy

Autorzy:

Nemcová, V.
Girman, V.
Hrabčáková, V.
Michalik, Š.
Bednarčík, J.
Almáši, M.
Sovák, P.

Powiązania:

https://bibliotekanauki.pl/articles/1367403.pdf

Data publikacji:

2014-07

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
61.46.Hk
61.05.J-

Opis:

The process of a primary crystallization of the $Fe_{72.5}Cu_{1}Nb_{2}Mo_{2}Si_{15.5}B_{7}$ alloys was investigated by differential thermal analysis (DTA), x-ray diffraction (XRD) and transmission electron microscopy (TEM). Amorphous ribbons were isothermally annealed for 0.5, 2, 6, 30 and 150 minutes at 520 °C. Both, the XRD and TEM study showed that the level of devitrification of the sample increases with the annealing time. The above mentioned techniques confirmed the presence of the nanocrystalline grains of the $Fe_{3}Si$ phase and enable us to study the evolution of the identified phase.

Źródło:

Acta Physica Polonica A; 2014, 126, 1; 116-117
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Passivation of a Bulk Defect E$\text{}_{c}$-0.22 eV in GaAs by Contact with Phosphoric Acid

Autorzy:

Babiński, A.
Gołdys, E.

Powiązania:

https://bibliotekanauki.pl/articles/1886500.pdf

Data publikacji:

1991-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.70.At
81.60.Cp
71.55.Eq

Opis:

The E$\text{}_{c}$-0.22 eV trap in Horizontal Bridgman undoped n-type GaAs may be passivated by contact with phosphoric acid for 8 hours at room temperature. Isochronal annealing, at around 250°C for 1 hour resulted in the partial recovery of this defect. The possible mechanisms of E$\text{}_{c}$-0.22 eV trap passivation are proposed.

Źródło:

Acta Physica Polonica A; 1991, 79, 2-3; 277-280
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 38.

Tytuł:

Structural and Magnetic Properties οf $Fe_{3-x}Ti_xSn$ Disordered Alloys

Autorzy:

Brzakalik, K.

Powiązania:

https://bibliotekanauki.pl/articles/1811583.pdf

Data publikacji:

2008-12

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
75.50.Bb
76.80.+y

Opis:

A series of $Fe_{3-x}Ti_xSn$ disordered alloys (where x = 0, 0.25, 0.5, and 0.75) obtained by arc-melting were studied. Directly after the melting all samples were mechanically crashed and in that form examined by the X-ray diffraction and Mössbauer effect methods. In $Fe_{3-x}Ti_xSn$ alloy with x = 0 three phases exist: FeSn (B35), $FeSn_2$ (C16) and Fe(Sn) (A2). The contributions of these phases decrease very fast in aid of ternary Fe-Ti-Sn alloys with the B2 and $D0_3$/$L2_1$ types of structure, as Ti atoms concentration increases. It was shown that these ternary alloys consist of four distinct Fe-Ti-Sn phases with contributions depending on the value of the x parameter. The value of hyperfine magnetic field $(B_{hf})$ parameter at the Fe nuclei is equal to about 110 kG for FeSn and $FeSn_2$ phases. However in alloys with A2, B2 and $D0_3$/$L2_1$ type of structure this value changes from 0 kG to 335 kG and can be considered (in the first approximation) as a function of Fe atoms number in the nearest neighborhood.

Źródło:

Acta Physica Polonica A; 2008, 114, 6; 1529-1536
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Rocking Curve Imaging Studies of Laterally Overgrown GaAs and GaSb Epitaxial Layers

Autorzy:

Wierzbicka, A.
Lübbert, D.
Domagała, J.
Zytkiewicz, Z.

Powiązania:

https://bibliotekanauki.pl/articles/1791425.pdf

Data publikacji:

2009-11

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
68.55.ag
81.15.Lm

Opis:

X-ray rocking curve imaging technique was used to study crystallographic perfection of laterally overgrown epitaxial structures. We focus on rocking curve imaging studies of Si-doped GaAs and GaSb laterally overgrown layers grown by liquid phase epitaxy on $SiO_{2}$ masked GaAs and GaSb/GaAs substrates, respectively. High spatial resolution offered by rocking curve imaging technique allows studying the effect of laterally overgrown epitaxial wing tilt towards the mask. Distribution of tilt magnitude over the area of laterally overgrown epitaxial stripes is easily determined. In heteroepitaxial GaSb/GaAs laterally overgrown epitaxial structures local mosaicity in the wing area was detected. Since individual grains are clearly visible on rocking curve imaging maps, their size and relative misorientation can be determined.

Źródło:

Acta Physica Polonica A; 2009, 116, 5; 976-978
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Fabrication and Raman Studies οf MgO/$SnO_2$ Core-Shell Heteronanowires

Autorzy:

Kim, H.

Powiązania:

https://bibliotekanauki.pl/articles/1807812.pdf

Data publikacji:

2009-07

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.07.-b
78.30.-j
61.05.cp

Opis:

We have reported the fabrication of MgO core/$SnO_2$ shell nanowires, by a two-step evaporation process. Thermal annealing induced changes in morphology, in which the nanowire surface became rough by the agglomeration of $SnO_2$ shell layers and its crystallinity was enhanced. It was found that three fundamental modes (475, 634, 772 $cm^{-1}$) and an infrared (IR)-active mode (682 $cm^{-1}$) of rutile $SnO_2$ appeared in the Raman spectrum of MgO core/$SnO_2$ shell nanowires. By thermal annealing, the relative intensity of the $A_{2u}$ to the $A_{1g}$ line was reduced, presumably due to the disorder or size effects.

Źródło:

Acta Physica Polonica A; 2009, 116, 1; 58-61
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 41.

Tytuł:

Structure and Magnetic Properties οf Fe(Mn)-Si-B-Nb-Cu Alloys

Autorzy:

Michalik, S.
Sovak, P.
Bednarcik, J.
Kollar, P.
Girman, V.

Powiązania:

https://bibliotekanauki.pl/articles/1810612.pdf

Data publikacji:

2009-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
75.50.Tt
77.80.Bh

Opis:

According to high energy X-ray diffraction measurements no significant changes were observed in a short range atomic order of amorphous ribbons $Fe_{73.5-x}Mn_xCu_1Nb_3Si_{13.5}B_9$ (x=1 up to 15 at.%). Thermal stability of the as-prepared alloys was investigated by differential scanning calorimetry and by in situ X-ray diffraction measurements. The two-step crystallization process was revealed, crystallization temperatures $T_{x1}$ and $T_{x2}$ were influenced by Mn content (thermal separation between $T_{x1}$ and $T_{x2}$ completely vanished for x=9). Nanocrystalline state of annealed samples was confirmed by electron transmission microscopy. The influence of Mn substitution on magnetic properties was confirmed by thermomagnetic measurements.

Źródło:

Acta Physica Polonica A; 2009, 115, 1; 399-402
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 42.

Tytuł:

Microstructure and Properties of YSZ Coatings Prepared by Plasma Spray Physical Vapor Deposition for Biomedical Application

Autorzy:

Barczyk, J.
Dercz, G.
Matuła, I.
Góral, M.
Maszybrocka, J.
Bochenek, D.
Gurdziel, W.

Powiązania:

https://bibliotekanauki.pl/articles/356455.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

PS-PVD method
bioactive coatings
cp-Ti
YSZ
osseointegration

Opis:

This paper presents the study of microstructure and properties of 8 mol% yttrium stabilized zirconia coating fabricated by Plasma Spray Physical Vapor Deposition technique on commercial pure titanium. The coating was characterized by X-ray diffraction, high resolution scanning electron microscope, profilometer, nanoindentation and nanomachining tests. The X-ray phase analysis exhibit the tetragonal Zr_0.935 Y_0.065O_1.968, TiO and α-Ti phases. The Rietveld refinement technique were indicated the changes of crystal structure of the produced coatings. The characteristic structure of columns were observed in High Resolutions Scanning Electron Microscopy. Moreover, the obtained coating had various development of surfaces, thickness was equal to 3.1(1) μm and roughness 0.40(7) μm. Furthermore, the production coatings did not show microcracks, delamination and crumbing. The performed experiment encourages carried out us to tests for osseointegration.

Źródło:

Archives of Metallurgy and Materials; 2019, 64, 2; 779-783
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Preparation and Characterization of Magnetic Nanoparticles

Autorzy:

Khmara, I.
Kubovcikova, M.
Koneracka, M.
Kalska-Szostko, B.
Zavisova, V.
Antal, I.
Rajnak, M.
Dankova, Z.
Kavecansky, V.
Omastova, M.
Kopcansky, P.

Powiązania:

https://bibliotekanauki.pl/articles/1030437.pdf

Data publikacji:

2018-03

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

47.65.Cb
61.05.Qr
61.05.cp

Opis:

The magnetic nanoparticles with core diameter 10 nm were modified by poly-L-lysine to bind antibody for cancer cell detection. Prepared biocompatible magnetic fluid (MFPLL) was characterized by dynamic light scattering method to obtain the particle size distribution. The microstructure of the MNPs and MFPLL samples were studied by transmission electron microscopy, X-ray diffraction and Mössbauer spectroscopy. Magnetic properties of the samples were measured by SQUID magnetometer and superparamagnetic behaviour of the samples was confirmed.

Źródło:

Acta Physica Polonica A; 2018, 133, 3; 704-706
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Effects of Heavy-Ions on Soft-Magnetic Metallic Glasses Studied by Diffraction of Synchrotron Radiation

Autorzy:

Michalik, S.
Pavlovic, M.
Gamcova, J.
Sovak, P.
Miglierini, M.

Powiązania:

https://bibliotekanauki.pl/articles/1032682.pdf

Data publikacji:

2017-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
75.50.Lk
61.43.Dq

Opis:

In this work, influence of ²³⁸U swift (5.9 MeV/u) heavy ions on the as-prepared Fe-Cu-Nb-Si-B metallic glass was investigated by in situ temperature X-ray diffraction of synchrotron radiation. It was observed that ion irradiation strongly affected the temperature evolution of the parameters of the first diffuse peak. It is hypothesized that ion irradiation induced structural rearrangement that increased the degree of disorder of the amorphous structure. During heat treatment, structural relaxation and annealing out of this ion-induced degradation took place. Consequently, the original structure was recovered as demonstrated by the behaviour of the first diffuse peak broadening and devitrification process.

Źródło:

Acta Physica Polonica A; 2017, 131, 4; 657-659
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Study of atoms arrangement in Zr-based bulk metallic glass structure

Autorzy:

Pilarczyk, W.
Podwórny, J.

Powiązania:

https://bibliotekanauki.pl/articles/1065200.pdf

Data publikacji:

2016-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
61.25.Mv
61.43.Dq

Opis:

Zr-Cu-Ni-Al bulk metallic glass is an attractive alloy system for scientific research and engineering applications. Alloys from this system exhibit high strength, hardness, corrosion resistance and good glass forming ability which makes them useful in many applications. In order to successfully apply amorphous materials, it is necessary to characterize their structure and properties, which are mutually dependent. The mechanical properties of the Zr-based amorphous alloy are the result of its unique, disordered structure. In this experiment, amorphous alloy of desirable composition in the form of a plate with thickness of 2 mm was prepared by melting high purity Zr, Cu, Ni, Al elements and casting into a copper mould by applying an ejection pressure. The amorphousness of rapidly solidified Zr₅₅Cu₃₀Ni₅Al₁₀ plate was examined by X-ray diffraction and microscopic observation. These investigations revealed that the studied Zr-based sample was amorphous. Based on experimental X-ray data the pair distribution function was calculated and discussion on possible atoms arrangement was carried out.

Źródło:

Acta Physica Polonica A; 2016, 129, 2; 216-218
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Catalytic compositions based on chlorides of d metals and natural aluminosilicates for the low-temperature sulfur dioxide oxidation with air oxygen

Autorzy:

Rakitskaya, T.
Kiose, T.
Golubchik, K.
Dzhiga, G.
Ennan, A.
Volkova, V.

Powiązania:

https://bibliotekanauki.pl/articles/1052764.pdf

Data publikacji:

2018-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
33.20.Ea
81.05.Ni

Opis:

Samples of natural bentonite and clinoptilolite modified with copper(II), iron(III), and palladium(II) were characterized by both X-ray phase and the Fourier transform infrared spectral methods. The activity of monometallic compositions M_{i}L_{j}/S(M = Co(II), Fe(III), and Pd(II); L = NO₃¯, Cl¯, and SO₄²¯; S = N-CLI or N-Bent) in the reaction with sulfur dioxide was found to depend on the nature of both a metal ion and a support. For bimetallic compositions Cu(II)-Fe(III) and Cu(II)-Pd(II) based on the natural aluminosilicates, a certain synergism in the action of metals forming these pairs towards the reaction of sulfur dioxide oxidation with oxygen was determined.

Źródło:

Acta Physica Polonica A; 2018, 133, 4; 1074-1078
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Bond Strength of Basalt Based Glass-Ceramic Coatings

Autorzy:

Bayrak, G.
Ercenk, E.
Sen, U.
Yilmaz, S.

Powiązania:

https://bibliotekanauki.pl/articles/1194582.pdf

Data publikacji:

2014-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.43.Fs
62.20.-x
61.05.cp

Opis:

In the present study, powders produced from the volcanic basalt rocks were coated on pre-coated AISI 1040 steel with Ni-5% Al bond coat by atmospheric plasma spray coating technique. The coated specimens were characterized by optical microscopy, scanning electron microscopy, metallography and X-ray diffraction. Bonding strength of coatings was evaluated in accordance with the ASTM C-633 method. Coated basalt material from the APS coating system was determined in the glassy amorphous state by X-ray diffraction analysis. The coated samples were heat-treated at 800C for 1-4 h for crystallization. The phases formed in the basalt base glass-ceramic coatings were augite, Fe-diopside, anorthite, and andesine which were detected by X-ray diffraction analysis. Basalt based glass-ceramic coatings include splat, porosity and un-melted particles which were the characteristic of plasma sprayed coatings. Experiment result showed that the crystallization time increase caused the decrease of the bond strengths of the coatings.

Źródło:

Acta Physica Polonica A; 2014, 125, 2; 620-622
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Granite Based Glass-Ceramic Materials

Autorzy:

Bayrak, G.
Yilmaz, S.

Powiązania:

https://bibliotekanauki.pl/articles/1194689.pdf

Data publikacji:

2014-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.43.Fs
62.20.-x
61.05.cp

Opis:

In this study, production possibility of glass and glass-ceramic produced from granite was investigated. The composition of granite based glass bath mixture was 50 wt% granite, 25 wt% dolomite and 25 wt% sodium carbonate. Composition that was grounded and mixed in a ball mill for 2 h was melted at 1500C for 1 h. Glass samples were heat treated for crystallization to produce glass-ceramic materials at 800°C, 900C and 1000C for 2 h to promote internal crystallization. Phase identifications of glass and glass-ceramic materials were investigated by X-ray diffraction analysis. Moreover, hardness and fracture toughness measurement of glass and glass-ceramic materials were applied. Granite based materials after that melting and casting process was found amorphous state by characterization with X-ray diffraction analysis. After the heat treatment processes, crystal phases settled out in glass matrix were also determined in granite based materials. Moreover, values of hardness and fracture toughness increasing were detected by heat treatment schedule.

Źródło:

Acta Physica Polonica A; 2014, 125, 2; 623-625
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

The Promising Synthetic Route Hydrothermal Synthesis of Non-Stoichiometric Cerium and Boron Containing Compounds and Characterization

Autorzy:

Çelik, G.
Kurtuluş, F.

Powiązania:

https://bibliotekanauki.pl/articles/1181838.pdf

Data publikacji:

2014-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

82.33.Pt
61.66.Fn
61.05.cp

Opis:

Cerium, the most abundant rare earth element, and boron containing mineral (lithium tetraborate pentahydrate) were used for synthesizing rare earth borates. Alternatively, for preparing rare earth borates, hydrothermal technique can be used. The non-stoichiometric cerium and boron containing compounds were synthesized by hydrothermal method using cerium sulphate and lithium tetraborate pentahydrate in appropriate molar ratio. Characterizations were done by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy/energy dispersive X-ray analysis, and thermogravimetric/differential thermal analysis.

Źródło:

Acta Physica Polonica A; 2014, 125, 2; 325-326
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

Characteristics of Ba-Doped PbS Thin Films Prepared by the SILAR Method

Autorzy:

Gülen, Y.

Powiązania:

https://bibliotekanauki.pl/articles/1205230.pdf

Data publikacji:

2014-08

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.-a
61.05.cp
68.55.Ln

Opis:

In this material production research, undoped and Ba-doped nanostructured PbS films are fabricated on glass surfaces by SILAR method. The structural, optical and morphological properties of the films are examined via scanning electron microscopy, UV-vis spectrophotometry and X-ray diffraction analysis. Scanning electron microscopy analysis revealed that Ba-doping concentration influences the size of the thin film's nanoparticles. X-ray diffraction results showed that all of the thin films are in a face centered cubic structure. Optical studies, in the room temperature, revealed that the optical band gap of the films increases as Ba-doping concentration is increased. The intercept values on the energy axis in the range of 1.86 eV and 2.12 eV for 1% and 8% Ba-doped PbS films respectively. As a result, it is concluded that the structural, optical and morphological properties of the fabricated thin films are directly depend on the Ba doping ratio.

Źródło:

Acta Physica Polonica A; 2014, 126, 3; 763-767
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 51.

Tytuł:

Structural and electrical properties of electrodeposited single junction of cuprous (I) oxide-copper

Autorzy:

Rówiński, E.
Pławecki, M.

Powiązania:

https://bibliotekanauki.pl/articles/1075639.pdf

Data publikacji:

2016-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
73.50.Pz
73.40.Sx

Opis:

Cuprous (I) oxide (Cu₂O)-based solar cells were fabricated with the use of the electrodeposition technique at nanometre-scale, and the structural, morphological and electrical properties were investigated. The Cu₂O layers were electrodeposited on crystalline and polycrystalline copper substrates. To complete the Cu₂O/Cu(100) and Cu₂O/Cu interfaces as the solar cells the top electrodes of silver paste were painted on the rear of Cu₂O. The microscopic analysis exhibits uneven surface morphologies of a Cu₂O film with the roughness of 92.5 nm, while the X-ray diffraction analysis reveals that the layers are Cu₂O-type polycrystalline structures with the thickness of 493 nm and the crystallite size of 69.8(6) nm. The theoretical analysis of the current-voltage curve was provided to determine the values of electrical parameters of the most efficient solar cell of Ag/Cu₂O/Cu(100) and clearly indicate presence of two Schottky barriers at interfaces.

Źródło:

Acta Physica Polonica A; 2016, 130, 4; 1141-1143
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 52.

Tytuł:

X-ray diffraction studies of the reversible phase transformation in NiTi shape memory alloy

Autorzy:

Lekston, Z.
Zubko, M.

Powiązania:

https://bibliotekanauki.pl/articles/1075673.pdf

Data publikacji:

2016-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

62.20.fg
81.30.Kf
61.05.cp

Opis:

In the present paper the phase transformations occurring in hot worked and heat-treated Ni-rich NiTi shape memory alloy were studied using X-ray diffraction, differential scanning calorimetry and bend and free recovery measurements. Based on conducted measurements it can be seen that in the studied alloy two-step B2 ↔ R ↔ B19' phase transitions occurred. Due to the fact that during heating the phase transition B2 → R and R → B19' occurs in a very narrow temperature range and differential scanning calorimetry peaks overlap additional X-ray diffraction measurements were performed. Obtained characteristic temperatures from applied different experimental methods are in good agreement. The optimum heat-treatment was selected to obtain rods with a shape recovery temperature A_{f} below 37°C to prepare prototypes of medical implants activated by patients body heat.

Źródło:

Acta Physica Polonica A; 2016, 130, 4; 1059-1062
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 53.

Tytuł:

Phase and Structural Behaviour of the $PrAlO_{3}-SmAlO_{3}$ System

Autorzy:

Basyuk, T.
Vasylechko, L.
Fadeev, S.
Berezovets, V.
Trots, D.
Niewa, R.

Powiązania:

https://bibliotekanauki.pl/articles/1550120.pdf

Data publikacji:

2010-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.Cp
61.50.Ks
81.30.Bx

Opis:

High resolution in situ X-ray powder diffraction applying synchrotron radiation and differential thermal analysis/scanning calorimetry methods have been used to examine the pseudo-binary system $PrAlO_3-SmAlO_3$. Two kinds of solid solutions with rhombohedral and orthorhombic structure exist at room temperature. At elevated temperatures, a continuous phase transition Pm3m ↔ R3c and a first-order transformation R3c ↔ Pbmn occur in the two respective phases. A sequence of low-temperature phase transformations R3c ↔ Imma ↔ C2/m has been detected in $Pr_{1-x}Sm_xAlO_3$ samples with x < 0.35. Based on in situ powder diffraction and differential thermal analysis/scanning calorimetry data, the phase diagram of the pseudo-binary system $PrAlO_3-SmAlO_3$ has been constructed.

Źródło:

Acta Physica Polonica A; 2010, 117, 1; 98-103
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 54.

Tytuł:

Deterioration of Mechanical Properties of MBE-Grown, Metastable Semiconductor Layer with Time: the Case of Zinc Blende MnTe

Autorzy:

Adamiak, S.
Dynowska, E.
Dziedzic, A.
Szmuc, K.
Janik, E.
Wiater, M.
Wojtowicz, T.
Szuszkiewicz, W.

Powiązania:

https://bibliotekanauki.pl/articles/1185914.pdf

Data publikacji:

2016-11

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
62.20.-x
64.60.My

Opis:

Several few μm thick (001)-oriented, metastable MnTe layers with the zinc blende structure grown onto (001)GaAs substrate by MBE during different periods for the last twenty years were investigated by the scanning electron microscopy, atomic force microscopy, X-ray diffraction, and nanoindentation methods. A partial decomposition of the oldest investigated layers was demonstrated. An important decrease of Young's modulus from about 34 GPa to about 17 GPa, resulting from a deterioration of the crystal structure of such layers, was found.

Źródło:

Acta Physica Polonica A; 2016, 130, 5; 1248-1250
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 55.

Tytuł:

F-AlCoPdGe Alloy with Three Types of Pseudo-Mackay Clusters

Autorzy:

Sugiyama, K.
Yubuta, K.
Yokoyama, Y.
Suzuki, S.
Simura, R.

Powiązania:

https://bibliotekanauki.pl/articles/1373510.pdf

Data publikacji:

2014-08

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.66.Dk
61.05.cp
61.44.Br

Opis:

The structure of an F-AlCoPdGe alloy was determined by single-crystal X-ray diffraction analysis: space group Pa3̅ (No. 205), Pearson symbol cP1128-142.4, a = 24.4338(4) Å; R1 = 0.0526 for the observed 5106 reflections with $F_0$ > 4.0σ$(F_0)$. The F-AlCoPdGe alloy exhibited three types of pseudo-Mackay clusters (pMCs). The first shell of the Co(13)-pMC at 24d indicated a coordination polyhedron typically found in Al-Co binary approximants; the second shell was a combination of an M icosahedron and an Al icosidodecahedron, where M is a mixed site of Pd and/or Co. The first shell of the Co(14)-pMC at 4b consisted of 20 partially occupied Al positions arranged in a dodecahedral fashion; its second shell was also composed of an M icosahedron and an Al icosidodecahedron. The first shell of the Al(18)-pMC at 4a consisted of a combination of an M cube and an Al octahedron, resulting in the rhombic dodecahedral arrangement; its outer shell structure was similar to those of the other pMCs. The structure of the F-AlCoPdGe phase comprised an arrangement of these three types of pMCs together with interstitially placed Al icosahedra around the Pd/Al(1) and Pd/Al(2) sites.

Źródło:

Acta Physica Polonica A; 2014, 126, 2; 588-593
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 56.

Tytuł:

Characterization of Nitinol Powder Produced by Reduction of Oxides by Calcium Hydride

Autorzy:

Sviridova, T.
Shuytcev, A.
Kasimtcev, A.
Markova, G.

Powiązania:

https://bibliotekanauki.pl/articles/1402065.pdf

Data publikacji:

2015-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.20.Ev
61.05.cp
68.37.Hk

Opis:

Several techniques were used to investigate the chemical and phase composition of four trial batches of nitinol powder produced by calciothermic reduction as well as their morphology and granulometric composition. Almost all powders produced by a similar procedure contained an allowable amount of impurities and were practically free of minor detrimental phases such as Ti₂Ni and Ni₃Ti. The powders under study have gamma or lognormal particle size distributions and spongy particles morphology typical of this production method. The tap density over 3g/cm³ was achieved at least in one case, which gives us an opportunity to successfully produce bulk articles by subsequent treatments such as sintering or hot isostatic pressing.

Źródło:

Acta Physica Polonica A; 2015, 128, 4; 510-513
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 57.

Tytuł:

Evidence of Formation of $Co_{x}Cu_{1-x}$ Nanoparticles with Core-Shell Structure

Autorzy:

Dhara, S.
Chowdhury, R.
Bandyopadhyay, B.

Powiązania:

https://bibliotekanauki.pl/articles/1402071.pdf

Data publikacji:

2015-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

75.75.Fk
61.05.cp
75.60.-d

Opis:

We have prepared $Co_{x}Cu_{1-x}$ granular alloys with Co contents (x ≈ 0.01-0.30) by chemical reduction. Samples are characterized by X-ray diffraction and transmission electron microscopy yielding particles of mean diameter 8-20 nm formed in fcc phase. The branching in ZFC/FC magnetization behavior confirm superparamagnetism in the samples, characterized by blocking temperature distributions which represent variations in particle size and inhomogeneities of their chemical compositions. Magnetic field dependence of magnetization show hysteresis loops, and the magnetization at any temperature 4-300 K is a combination of ferromagnetism and superparamagnetism. The saturation moment of Co for the ferromagnetism part increases with the Co content. But the coercive fields $(H_{C})$ and magnetic anisotropy of the particles do not vary with Co concentration. Annealed samples exhibit exchange bias in the range 20-150 Oe at 4 K. The results indicate formation of nanoparticles of CoCu alloy in a core-shell type structure with Co being concentrated near the core.

Źródło:

Acta Physica Polonica A; 2015, 128, 4; 533-535
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 58.

Tytuł:

Effect of Heating Rate on the Formation of Intermetallics during SHS Process

Autorzy:

Novák, P.
Michalcová, A.
Školáková, A.
Průša, F.
Kříž, J.
Marek, I.
Kubatík, T.
Karlík, M.
Haušild, P.
Kopeček, J.

Powiązania:

https://bibliotekanauki.pl/articles/1402079.pdf

Data publikacji:

2015-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.66.Dk
65.40.-b
61.05.cp

Opis:

Self-propagating high-temperature synthesis is a simple and efficient method for the synthesis of various compounds including ceramics and intermetallics. In this process, the compressed mixture of elemental or master alloy powders is ignited or heated to initiate the exothermic reactions leading to the formation of desired compounds. In order to control the process efficiently, the effect of several important parameters has to be determined in each applied alloy system. Previous results showed that those parameters are: initiation temperature, process duration, pressure used for compression and heating rate. This paper is devoted to the description and explanation of the effect of the heating rate on the formation of intermetallics during self-propagating high-temperature synthesis in Fe-Al and Ni-Ti systems. Differential thermal analysis of compressed powder mixtures under various heating conditions and microstructure observation of samples prepared by various heating rates using electric resistance heating and spark plasma sintering were carried out. The effect of heating rates on the formations of intermetallics in studied systems is discussed in this paper.

Źródło:

Acta Physica Polonica A; 2015, 128, 4; 561-563
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 59.

Tytuł:

Annealing Effects after Various Thermo-Mechanical Treatments on Microstructure and Mechanical Properties of Wrought Magnesium Alloy ZK60

Autorzy:

Oo, M.
Janeček, M.
Kral, R.
Wagner, L.

Powiązania:

https://bibliotekanauki.pl/articles/1419020.pdf

Data publikacji:

2012-09

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.40.Gh
81.07.Bc
61.05.cp

Opis:

The magnesium alloy ZK60 received from Dead Sea Magnesium in direct-chill cast condition was extruded at T = 350C using an extrusion ratio of ER = 12. The extruded bars were severely plastically deformed at 250C by either equal channel angular pressing or swaging. While swaging led to similar grain refinements as observed after equal channel angular pressing, yield stress and tensile strength values were by far superior in the swaged material. This result is explained by the unfavourable 45° texture component of the (0002) pole figure that develops during the massive shear deformation in equal channel angular pressing. Unlike equal channel angular pressing, the grain orientation after swaging is similar as in the as-extruded condition. Annealing at elevated temperatures indicates very low thermal stability of microstructure and mechanical properties in the equal channel angular pressing material while both properties in the swaged microstructure are as stable as in the as-extruded reference.

Źródło:

Acta Physica Polonica A; 2012, 122, 3; 606-609
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 60.

Tytuł:

The Effect of Carbon Coating on the Electrochemical Performance of Nanosized $Li_2FeSiO_4$ Cathode Materials

Autorzy:

Wang, Y.
Su, D.
Wang, G.

Powiązania:

https://bibliotekanauki.pl/articles/1399781.pdf

Data publikacji:

2013-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
61.46.Hk
68.37.-d

Opis:

Carbon-coated $Li_2FeSiO_4//C$ cathode materials have been synthesized through a modified ball-milling process. The physical characterizations of $Li_2FeSiO_4$ were conducted by using X-ray powder diffraction, field-emission scanning electron microscopy and transmission electron microscopy techniques. Field-emission scanning electron microscopy and transmission electron microscopy images revealed that $Li_2FeSiO_4//C$ consists of nanosized particles coated with an amorphous carbon layer. The electrochemical performances of $Li_2FeSiO_4//C$ cathode materials were evaluated through fully assembled lithium batteries via cyclic voltammetry, charge/discharge test and electrochemical impedance spectroscopy. The $Li_2FeSiO_4//C$ cathode materials showed a much improved electrochemical performance in terms of higher specific capacity, better cycling performance and less charge transfer resistance than that of the pristine $Li_2FeSiO_4$.

Źródło:

Acta Physica Polonica A; 2013, 123, 2; 279-282
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 61.

Tytuł:

Data Processing Programs for Analysis of Diffraction Images of Macromolecular Crystals Recorded using Synchrotron Radiation

Autorzy:

Gilski, M.

Powiązania:

https://bibliotekanauki.pl/articles/1431531.pdf

Data publikacji:

2012-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.10.-i
07.85.Qe
61.05.cp

Opis:

Besides the crystal preparation, the first and crucial step in the process of protein structure determination is proper processing of the collected diffraction images, as they provide the experimental observations used throughout the entire process of structure solution and refinement. In the last two decades several computer programs have been developed. Among the most used and popular are: HKL2000, MOSFLM, d*TREK and XDS package. To find out the advantages and disadvantages of the data processing programs, several very different data sets, including diffraction data from DNA/RNA and protein crystals were tested. It has been found that all the major programs for processing and analysis of diffraction data give excellent and comparable results with good quality, medium resolution data sets, but their treatment of very high resolution or imperfect data differs in terms of indexing, spot integration, scaling and the treatment of errors. If the diffraction data are of good quality and the problem is relatively straightforward, the automated approach to data processing may be most appropriate. On the other hand, if one is trying to squeeze out as much information from the experimental data as possible, then only expert manual processing can be successful, regardless of the data quality.

Źródło:

Acta Physica Polonica A; 2012, 121, 4; 871-875
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 62.

Tytuł:

Pressure Variation of the Strain State of MnAs Nanoclusters Embedded in GaAs

Autorzy:

Bak-Misiuk, J.
Dynowska, E.
Romanowski, P.
Misiuk, A.
Sadowski, J.
Caliebe, W.

Powiązania:

https://bibliotekanauki.pl/articles/1431599.pdf

Data publikacji:

2012-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
75.50.Pp
81.40.Vw

Opis:

Granular GaAs:(Mn,Ga)As films were prepared by annealing at 500°C under ambient and enhanced hydrostatic pressure (1.1 GPa), of $Ga_{1-x}Mn_xAs//GaAs$ layers (x = 0.025, 0.03, 0.04, 0.05 and 0.063) grown at 230°C by molecular beam epitaxy method. Distinct influence of enhanced hydrostatic pressure applied during sample annealing on strain state of inclusions was found. An increase of lattice distortion and of strain of inclusions for the samples treated under hydrostatic pressure is related to different bulk moduli of GaAs and of MnAs

Źródło:

Acta Physica Polonica A; 2012, 121, 4; 903-905
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 63.

Tytuł:

Effects of Thermal Annealing and Film Thickness on the Structural and Morphological Properties of Titanium Dioxide Films

Autorzy:

Çörekçí, S.
Kızılkaya, K.
Asar, T.
Öztürk, M.
Çakmak, M.
Özçelík, S.

Powiązania:

https://bibliotekanauki.pl/articles/1491428.pdf

Data publikacji:

2012-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

68.55.J-
61.05.cp
68.37.Ps

Opis:

Titanium dioxide $(TiO_2)$ thin films having different thicknesses of 220, 260, and 300 nm were deposited onto well-cleaned n-type silicon substrates by reactive DC magnetron sputtering and annealed in the range of 200-1000C in steps of 200°C. The effects of thermal annealing and thickness variation on the crystalline quality and surface morphology of the films were investigated by X-ray diffraction and atomic force microscopy measurements. It was found that the film quality and morphology depend on the annealing temperature. $TiO_2$ films exhibit a grain-like surface morphology. The root-mean-square roughness and grain size on the surface increase as a result of increasing film thickness.

Źródło:

Acta Physica Polonica A; 2012, 121, 1; 247-248
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 64.

Tytuł:

Structural and Optical Characterization of $TiO_2$ Thin Films Prepared by Sol-Gel Process

Autorzy:

Karabay, I.
Aydın Yüksel, S.
Ongül, F.
Öztürk, S.
Aslı, M.

Powiązania:

https://bibliotekanauki.pl/articles/1491461.pdf

Data publikacji:

2012-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

78.20.-e
81.20.Fw
61.05.cp

Opis:

Titanium dioxide $(TiO_2)$ thin films were prepared by spin coating technique of sol precursor on Corning 7059 glass substrates. Spectral transmittances of as deposited and annealed samples were measured in the range of 250 to 1100 nm. Optical band gaps were calculated from the Tauc plots and was found to be about 3.78 eV for the annealed samples at 500°C. X-ray diffraction patterns were performed with as deposited and annealed samples. By annealing the samples at 500C in various annealing times, the structure has changed from amorphous to the anatase crystalline state. Variations of the band gap energy values of $TiO_2$ films with cobalt doping were also investigated. Cobalt doping decreased the band gap value of $TiO_2$ films down to 3.25 eV. X-ray diffraction patterns were also given for the doped samples.

Źródło:

Acta Physica Polonica A; 2012, 121, 1; 265-267
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 65.

Tytuł:

Determination of Orientational Order Parameters of Two Tri-Component Mixtures from Optical Birefringence and X-Ray Diffraction Measurements

Autorzy:

Basak, S.
Dasgupta, P.
Das, B.
Das, M.
Dabrowski, R.

Powiązania:

https://bibliotekanauki.pl/articles/1492775.pdf

Data publikacji:

2011-12

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
61.30.-v
42.70.Df

Opis:

Two tri-component mixtures as base mixtures for vertically aligned mode LCD's were prepared. The eutectic compositions were theoretically estimated and experimentally verified from differential scanning calorimetry studies. A room temperature nematic mixture with fairly broad operating range emerged from each of the tri-component mixtures. The optical birefringence of these mixtures at the eutectic composition was measured as a function of temperature. X-ray diffraction measurements were done on these mixtures to obtain the orientational order parameters as a function of temperature. The order parameter values were also determined from birefringence measurements and the results were compared with mean field theory. Structural parameters like intermolecular distance and apparent molecular length have also been determined.

Źródło:

Acta Physica Polonica A; 2011, 120, 6; 1037-1042
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 66.

Tytuł:

Microstructural Study of Fe-Si(Ge)-Nb-Cu-B Finemet Alloys

Autorzy:

Michalik, S.
Bednarcik, J.
Brzózka, K.
Sovak, P.
Górka, B.

Powiązania:

https://bibliotekanauki.pl/articles/1534048.pdf

Data publikacji:

2010-11

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
61.05.C-
61.46.Hk

Opis:

Structural changes in Finemet based alloys invoked by germanium replacement for silicon were investigated using the X-ray diffraction, the X-ray absorption spectroscopy and the Mössbauer spectroscopy. Ge substitution preserves a nanostructural character of annealed samples at temperature 550°C; specifically the formation of a $DO_3$-type with about 19 at.% of (Si,Ge) was confirmed. The mean size of nanocrystals was estimated to be about 7 nm.

Źródło:

Acta Physica Polonica A; 2010, 118, 5; 818-819
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 67.

Tytuł:

Structural, Electrical and Mössbauer Effect Studies of 0.5Bi $rm_{0.95}Dy_{0.05}FeO_3-0.5Pb(Fe_{0.5}Nb_{0.5})O_3$ Multiferroics

Autorzy:

Stoch, A.
Kulawik, J.
Stoch, P.
Maurin, J.
Zachariasz, P.

Powiązania:

https://bibliotekanauki.pl/articles/1811599.pdf

Data publikacji:

2008-12

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
76.80.+y
77.22.-d

Opis:

$0.5Bi_{0.95}Dy_{0.05}FeO_3-0.5Pb(Fe_{0.5}Nb_{0.5})O_3$ is a multiferroic material which exhibits ferroelectric and antiferromagnetic ordering. (The synthesis of such compounds is rather difficult.) In this paper the way of the synthesis of $0.5Bi_{0.95}Dy_{0.05}FeO_3-0.5Pb(Fe_{0.5}Nb_{0.5})O_3$ is presented. The detailed X-ray and Mössbauer effect studies were done and crystal and hyperfine interaction parameters were obtained. To measure electrical properties of the compound the impedance spectroscopy measurements were performed. The obtained impedance spectra were fitted using a proposed equivalent electrical circuit and the results were discussed in the scope of the brick layer model without easy paths.

Źródło:

Acta Physica Polonica A; 2008, 114, 6; 1585-1590
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 68.

Tytuł:

Spatially Resolved X-ray Diffraction Technique for Crystallographic Quality Inspection of Semiconductor Microstructures

Autorzy:

Domagala, J.
Czyzak, A.
Zytkiewicz, Z.

Powiązania:

https://bibliotekanauki.pl/articles/1811925.pdf

Data publikacji:

2008-11

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
61.72.Ff
68.55.ag

Opis:

Spatially resolved X-ray diffraction is introduced and applied for micro-imaging of strain in GaAs and GaSb layers grown by epitaxial lateral overgrowth on GaAs substrates. We show that laterally overgrown parts of the layers (wings) are tilted towards the underlying mask. By spatially resolved X-ray diffraction mapping the direction of the tilt and distribution of tilt magnitude across the width of each layer can be readily determined. This allows measuring of the shape of the lattice planes in individual epitaxial stripes. In GaSb/GaAs heteroepitaxial laterally overgrown layers local mosaicity in the wing area was found. By spatially resolved X-ray diffraction the size of microblocks and their relative misorientation were analyzed. Finally, microscopic curvature of lattice planes confined between two neighboring slip bands in thermally strained Si wafers is measured. All these examples show advantages of spatially resolved X-ray diffraction over a standard X-ray diffraction when applied for analysis of crystalline microstructures.

Źródło:

Acta Physica Polonica A; 2008, 114, 5; 1101-1107
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 69.

Tytuł:

Automation and Remote Synchrotron Data Collection

Autorzy:

Gilski, M.

Powiązania:

https://bibliotekanauki.pl/articles/1812241.pdf

Data publikacji:

2008-08

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

07.85.Qe
61.05.cp
61.05.cf

Opis:

X-ray crystallography is the natural choice for macromolecular structure determination by virtue of its accuracy, speed, and potential for further speed gains, while synchrotron radiation is indispensable because of its intensity and tuneability. Good X-ray crystallographic diffraction patterns are essential and frequently this is achievable through using the few large synchrotrons located worldwide. Beamline time on these facilities have long queues, and increasing the efficiency of utilization of these facilities will help in expediting the structure determination process. Automation and remote data collection are therefore essential steps in ensuring that macromolecular structure determination becomes a very high throughput process.

Źródło:

Acta Physica Polonica A; 2008, 114, 2; 331-338
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 70.

Tytuł:

DSL Photoetching: Principles and Application to Study Nature of Defects in III-V Materials

Autorzy:

Weyher, J.

Powiązania:

https://bibliotekanauki.pl/articles/1888018.pdf

Data publikacji:

1991-08

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.60.Cp
61.70.Jc
61.70.At

Opis:

After a short general description of the chemical etching of semiconductors the mechanisms of defect-selective etching are described in detail. Two distinct mechanisms that lead to the formation of etch pits and etch hillocks on dislocations emerging at a semiconductor surface are discussed. The principles of the formation of defect-related etch features are described for the HF-CrO$\text{}_{3}$-H$\text{}_{2}$O etching system used for etching of GaAs. A model of surface reactions is presented and the influence of illumination during etching on the defect-selectivity is emphasized. The use of ultra sensitive photoetching to study the nature and origin of complex defects in SI and n-like GaAs is documented. In particular, the concept for the formation of dislocation cell structure in undoped GaAs is presented and the ability of photoetching to reveal the structural changes during annealing is visualized.

Źródło:

Acta Physica Polonica A; 1991, 80, 2; 149-160
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 71.

Tytuł:

Semi-Insulating Transition Metal-Doped III-V Materials

Autorzy:

Hennel, Andrzej M.

Powiązania:

https://bibliotekanauki.pl/articles/1877336.pdf

Data publikacji:

1991-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

71.55.Eq
72.80.Ey
81.60.Cp

Opis:

This review surveys the properties of transition metal (TM) doped semi-insulating (SI) III-V semiconductors. After a general definition of a SI material, a simple model of a SI crystal with a midgap donor and shallow impurities is discussed. A short history, main properties, and thermal stability problems of SI Cr-doped GaAs are presented. The puzzling problem of SI V-doped GaAs is explained. Several dopants (Cr, Fe, Co, and Ti) in SI InP are discussed in terms of the resistivities obtained, as well as thermal stability. Finally, GaP and GaInAs high resistivity systems are considered.

Źródło:

Acta Physica Polonica A; 1991, 79, 1; 15-29
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 72.

Tytuł:

Investigation of acute-phase protein concentrations in healthy and various diseased cats

Autorzy:

Tuna, G.E.
Ulutas, B.

Powiązania:

https://bibliotekanauki.pl/articles/16647378.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

acute phase protein
AGP
cat
Cp
Hp
SAA
SIRS

Opis:

This study aimed to evaluate the concentrations of α1-acid glycoprotein (AGP), haptoglobin (Hp), serum amyloid-A (SAA) and ceruloplasmin (Cp) in healthy and various diseased cats and establish reference intervals (RIs) for these acute phase proteins (APPs) in healthy cats. The animal material of the study consisted of 40 healthy cats and 152 cats with various diseases. The serum APPs in the diseased group were higher than those in the healthy group, and age affected Cp concentration in healthy cats. Also, the systemic inflammatory response syndrome (SIRS) positive (+) group had significantly higher AGP concentrations than the SIRS negative (-) group. In conclusion, this study contributes to the limited number of studies on RIs in serum APPs concentrations in healthy cats. The results of this study suggest that APPs are valuable diagnostic tools for identifying the inflammatory processes of various diseases, and AGP concentration could help determine the severity of the inflammatory condition.

Źródło:

Polish Journal of Veterinary Sciences; 2022, 25, 4; 589-597
1505-1773

Pojawia się w:

Polish Journal of Veterinary Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 73.

Tytuł:

A function space Cp(X) not linearly homeomorphic to Cp(X) × ℝ

Autorzy:

Marciszewski, Witold

Powiązania:

https://bibliotekanauki.pl/articles/1205429.pdf

Data publikacji:

1997

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

function space
pointwise convergence topology
$c_p(X)$
linear homeomorphism

Opis:

We construct two examples of infinite spaces X such that there is no continuous linear surjection from the space of continuous functions $c_p(X)$ onto $c_p(X)$ × ℝ$. In particular, $c_p(X)$ is not linearly homeomorphic to $c_p(X)$ × ℝ$. One of these examples is compact. This answers some questions of Arkhangel'skiĭ.

Źródło:

Fundamenta Mathematicae; 1997, 153, 2; 125-40
0016-2736

Pojawia się w:

Fundamenta Mathematicae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 74.

Tytuł:

Research on a control system based on stepping motor for ship’s controllable pitch propellers

Autorzy:

Dymarski, C.

Powiązania:

https://bibliotekanauki.pl/articles/258652.pdf

Data publikacji:

2008

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

ship controllable pitch (CP) propellers
hydraulic drive and control
control systems

Opis:

This paper presents description of a laboratory stand for testing servo-mechanisms of ship low-power CP propellers, as well as a remote control system for such propellers, based on electric stepping motor. Also, are presented results of the first series of tests of the control system, carried out on non-loaded CP propeller by applying stepped values of propeller pitch at two values of rotational speed of the stepping motor.

Źródło:

Polish Maritime Research; 2008, 1; 37-41
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 75.

Tytuł:

Molecular composition of humic substances isolated from selected soils and cryconite of the Grønfjorden area, Spitsbergen

Autorzy:

Polyakov, Vyacheslav
Zazovskaya, Elya
Abakumov, Evgeny

Powiązania:

https://bibliotekanauki.pl/articles/2041903.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Arctic
Svalbard
CP/MAS 13C-NMR
elemental composition
organic matter

Źródło:

Polish Polar Research; 2019, 40, 2; 105-120
0138-0338
2081-8262

Pojawia się w:

Polish Polar Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 76.

Tytuł:

Process capability study by production of hydraulic components
Badanie zdolności jakościowej procesu produkcji elementów hydraulicznych

Autorzy:

Lestyanszka-Skurkova, K.
Ulewicz, R.

Powiązania:

https://bibliotekanauki.pl/articles/952214.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane

Tematy:

serial production
control charts
process capability
process stability
Cp and Cpk indices
produkcja seryjna
karty kontrolne
zdolność jakościowa procesu
uregulowanie statystyczne procesu
współczynniki Cp i Cpk

Opis:

This study focuses on ISO evaluation of process capability in the production of hydraulic components according to ISO 9001: 2008 Quality Management Systems requirements. Statistical process control is analysed on the basis of normality and stability of the process, and c cutting process capability indices Cp and Cpk are calculated. The values obtained for indices are Cp = 3.29 and Cpk = 0.73. Therefore, it can be considered the process is capable.
Przedstawione badania dotyczą analizy zdolności jakościowej procesu produkcji elementów h hydraulicznych zgodnie z normą ISO 9001: 2008 (W Wymagania dotyczące systemów zarządzania jakością). Statystyczna kontrola procesu cięcia jest analizowana na podstaw wie rozkładu normalnego i analizy zdolności jakościowej procesu w oparciu o współczynniki Cp i Cpk. Uzyskane wyniki współczynników wynoszą odpowiednio Cp = 3,29 i Cpk = 0,73. W oparciu o uzyskane wyniki możemy uznać, że proces jest statystycznie uregulowany, ale przesunięty względem wartości nominalne ej.

Źródło:

Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Technika, Informatyka, Inżynieria Bezpieczeństwa; 2014, T. 2; 155-164
2300-5343

Pojawia się w:

Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Technika, Informatyka, Inżynieria Bezpieczeństwa

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 77.

Tytuł:

Enhanced Chondrocyte Proliferation in a Prototyped Culture System with Wave-Induced Agitation

Autorzy:

Pilarek, M.
Godlewska, K.
Kuźmińska, A.
Wojasiński, M.
Dąbkowska, K.

Powiązania:

https://bibliotekanauki.pl/articles/184988.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

wave-induced agitation
small-scale animal cell culture
CP5 chondrocytes
fibrousbased
scaffold
single-use bioreactor
wzbudzanie falowe
hodowla komórek zwierzęcych
Chondrocyty CP5
szafot
bioreaktor

Opis:

One of the actual challenges in tissue engineering applications is to efficiently produce as high of number of cells as it is only possible, in the shortest time. In static cultures, the production of animal cell biomass in integrated forms (i.e. aggregates, inoculated scaffolds) is limited due to inefficient diffusion of culture medium components observed in such non-mixed culture systems, especially in the case of cell-inoculated fiber-based dense 3D scaffolds, inside which the intensification of mass transfer is particularly important. The applicability of a prototyped, small-scale, continuously wave-induced agitated system for intensification of anchorage-dependent CP5 chondrocytes proliferation outside and inside three-dimensional poly(lactic acid) (PLA) scaffolds has been discussed. Fibrous PLA-based constructs have been inoculated with CP5 cells and then maintained in two independent incubation systems: (i) non-agitated conditions and (ii) culture with wave-induced agitation. Significantly higher values of the volumetric glucose consumption rate have been noted for the system with the wave-induced agitation. The advantage of the presented wave-induced agitation culture system has been confirmed by lower activity of lactate dehydrogenase (LDH) released from the cells in the samples of culture medium harvested from the agitated cultures, in contrast to rather high values of LDH activity measured for static conditions. Results of the proceeded experiments and their analysis clearly exhibited the feasibility of the culture system supported with continuously wave-induced agitation for robust proliferation of the CP5 chondrocytes on PLA-based structures. Aside from the practicability of the prototyped system, we believe that it could also be applied as a standard method offering advantages for all types of the daily routine laboratory-scale animal cell cultures utilizing various fiber-based biomaterials, with the use of only regular laboratory devices.

Źródło:

Chemical and Process Engineering; 2017, 38, 2; 321-330
0208-6425
2300-1925

Pojawia się w:

Chemical and Process Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 78.

Tytuł:

Thermal Behaviour of PrCo_{1-x}Fe_xO₃ Probed by X-ray Synchrotron Powder Diffraction and Impedance Spectroscopy Measurements

Autorzy:

Pekinchak, O.
Sugak, D.
Ubizskii, S.
Suhak, Yu.
Fritze, H.
Vasylechko, L.

Powiązania:

https://bibliotekanauki.pl/articles/1029711.pdf

Data publikacji:

2018-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.66.Fn
61.05.cp
65.40.De
72.60.+g

Opis:

Crystal structure and transport properties of the mixed praseodymium cobaltites-ferrites PrCo_{1-x}Fe_xO₃ have been studied in the temperature range of 298-1173 K by a combination of in situ X-ray synchrotron powder diffraction and temperature dependent impedance spectroscopy measurements. In situ high temperature powder diffraction examination of PrCo_{1-x}Fe_xO₃ series revealed considerable anomalies in the lattice expansion which are especially pronounced for the cobalt-rich specimens. These anomalies, which are reflected in a sigmoidal dependence of the unit cell dimensions and in the considerable increase of the thermal expansion coefficients, are obviously associated with transitions of Co^{3+} ions from low spin to the higher spin states and the coupled metal-insulator transitions, occurring in in rare earth cobaltites at the elevated temperatures. Indeed, the temperature-dependent impedance measurements clearly prove the change of conductivity type from dielectric to the metallic behaviour in the mixed cobaltite-ferrites PrCo_{1-x}Fe_xO₃ at the elevated temperatures.

Źródło:

Acta Physica Polonica A; 2018, 133, 4; 798-801
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 79.

Tytuł:

Selected Properties of ZnO Coating on Mg-Based Alloy for Biomedical Application

Autorzy:

Kania, A.
Pilarczyk, W.
Babilas, R.

Powiązania:

https://bibliotekanauki.pl/articles/1029768.pdf

Data publikacji:

2018-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

68.55.-a
61.05.cp
68.37.Ps
82.45.Bb

Opis:

Magnesium and its alloys are interesting materials for biodegradable implant applications. Magnesium alloys have very good strength properties, they are lightweight, but their main disadvantage is a low corrosion resistance in the physiological environment. Various modifications of a Mg alloys surface by deposition of different coatings are used to prevent untimely dissolution. The article presents the investigation results of a thin ZnO coating deposited on a MgCa2Zn1Gd3 alloy by means of the magnetron sputtering method. The studies include: scanning electron microscope observation of the ZnO surface, X-ray phase analysis, surface roughness measurement in atomic force microscopy, the microhardness test and potentiodynamic corrosion resistance test in the Ringer solution at 37°C. It was found that the ZnO coating is compact and continuous. It increases the hardness of the MgCa2Zn1Gd3 alloy and also improves its corrosion resistance. The corrosion potential is shifted slightly towards the positive values from -1.52 V to -1.50 V for the alloy with the ZnO coating.

Źródło:

Acta Physica Polonica A; 2018, 133, 2; 222-224
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 80.

Tytuł:

Synthesis and Vibration Spectroscopy of Nano-Sized Manganese Oxides

Autorzy:

Mironova-Ulmane, N.
Kuzmin, A.
Skvortsova, V.
Chikvaidze, G.
Sildos, I.
Grabis, J.
Jankoviča, D.
Dindune, A.
Maiorov, M.

Powiązania:

https://bibliotekanauki.pl/articles/1030995.pdf

Data publikacji:

2018-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.07.Wx
61.05.cp
78.30.Hv
75.30.Cr

Opis:

X-ray diffraction, micro-Raman and the Fourier transform infrared spectroscopies as well as magnetometry measurements were performed on nanosized manganese oxides to probe their phase composition and magnetic properties. It was shown that the XRD method is less sensitive to phase composition of manganese oxide samples than spectroscopic methods. While in some samples the XRD method recognised only the manganosite MnO phase, the Raman and FT-IR methods revealed additionally the presence of the hausmannite Mn₃O₄ phase.

Źródło:

Acta Physica Polonica A; 2018, 133, 4; 1013-1016
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 81.

Tytuł:

Structure and magnetic properties of Fe-B-Si-Zr metallic glasses

Autorzy:

Babilas, R.
Radoń, A.
Gębara, P.

Powiązania:

https://bibliotekanauki.pl/articles/1054824.pdf

Data publikacji:

2017-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

33.45.+x
61.05.cp
64.70.pe
75.50.Kj

Opis:

Fe-based amorphous alloys were characterized by X-ray diffraction, transmission Mössbauer spectroscopy and vibrating sample magnetometry. The studies were performed on (Fe_{0.75}B_{0.15}Si_{0.1})_{100-x}Zr_{x} (x=0, 1, 3) metallic glasses in the form of ribbons. The glassy samples were prepared by the "melt spinning" technique in argon protective atmosphere. The XRD patterns show the broad diffraction halo that is typical for amorphous Fe-based alloys. The Mössbauer spectroscopy allows to study the local environments of the Fe atoms in the glassy state, showing the changes in the amorphous structure due to the changing of Zr addition. From hysteresis loops obtained from vibrating sample magnetometry measurements, coercive force and saturation magnetization were determined versus different Zr content. The obtained magnetic properties allow to classify the studied amorphous alloys in as-cast state as soft magnetic materials.

Źródło:

Acta Physica Polonica A; 2017, 131, 4; 726-728
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 82.

Tytuł:

Crystal structure and EPR investigation of pyrazinamide containing copper (II) 2-nitrobenzoate single crystal

Autorzy:

Çelik, Y.
Bozkurt, E.
Karabulut, B.
Dege, N.

Powiązania:

https://bibliotekanauki.pl/articles/1070369.pdf

Data publikacji:

2016-07

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
75.10.Dg
76.30.-v
78.30.-j

Opis:

The crystal structure and paramagnetism in the pyrazinamide containing copper(II) 2-nitrobenzoate single crystal were investigated using X-ray diffraction, Fourier-transform infrared spectroscopy, and electron paramagnetic resonance techniques. X-ray diffraction analysis shows that the complex crystallizes in monoclinic system having two molecules in the unit cell. After using curve fitting method to the electron paramagnetic resonance spectra, anisotropic g and hyperfine A tensors were obtained. The local symmetry, spin Hamiltonian parameters, and molecular bonding coefficients of the paramagnetic Cu²⁺ ion were determined. Perturbation approach was applied to the spin Hamiltonian to calculate the g and A values.

Źródło:

Acta Physica Polonica A; 2016, 130, 1; 163-166
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 83.

Tytuł:

Application of differential PDF to the structural characterization of supported catalysts

Autorzy:

Sommariva, M.
Dadivanyan, N.
Gateshki, M.
Rayner, M.
Lukashuk, L.
Rupprechter, G.
Föttinger, K.

Powiązania:

https://bibliotekanauki.pl/articles/1112335.pdf

Data publikacji:

2016-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cf
61.05.cp
07.85.Jy
82.45.Jn

Opis:

This paper reports the use of a differential PDF approach performed on a laboratory X-ray diffractometer, for the analysis of nanosized PdO phase distributed on the reducible Fe₂O₃ support.

Źródło:

Acta Physica Polonica A; 2016, 130, 4; 884-885
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 84.

Tytuł:

Size Dependence of Magnetic and Optical Properties of $Co_3O_4$ Nanoparticles

Autorzy:

Sarfraz, A.
Hasanain, S.

Powiązania:

https://bibliotekanauki.pl/articles/1206616.pdf

Data publikacji:

2014-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.05.Gc
61.05.cp
75.75.-c
78.66.-w

Opis:

The effect of particle size on the magnetic and optical properties of cobalt oxide $Co_3O_4$ has been investigated. Single phase $Co_3O_4$ nanoparticles were synthesized by co-precipitation route and their structure was confirmed through X-ray diffraction analysis. The average crystallite sizes of the nanoparticles as determined from the X-ray diffraction were found to lie in the range of 13 to 59 nm. At room temperature these particles show paramagnetic response and the DC magnetic moment of the samples showed an increasing trend with increasing particle size. Both the antiferromagnetic Néel temperature $T_{N}$ and the low temperature moment depict finite size effects in the AC susceptibility measurements. The optical absorption studies show that there are two direct band gaps in $Co_3O_4$, the main energy band gap and a sub-band located inside the main energy gap. The values of these energy band gaps for the 45 nm particles were determined to be 3.15 and 1.76 eV, respectively. The direct band gap in these particles clearly shows a blue shift with decreasing size attributable to the quantum confinement effect.

Źródło:

Acta Physica Polonica A; 2014, 125, 1; 139-144
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 85.

Tytuł:

Microwave-Assisted Synthesis of $CeVO_4$ in the Mild Conditions, Characterization and Investigation of Luminescent Properties

Autorzy:

Çelik, G.
Kurtuluş, F.

Powiązania:

https://bibliotekanauki.pl/articles/1218871.pdf

Data publikacji:

2014-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

84.40.-x
33.50.Dq
61.05.cp
82.33.Pt

Opis:

$CeVO_4$ (ICDD: 12-757) was synthesized by microwave-assisted method by using cerium sulphate and vanadium (V) oxide in an appropriate molar ratio. Characterizations were done by X-ray diffraction, Fourier transform infrared spectroscopy, ultraviolet spectrophotometry and thermogravimetric/differential thermal analysis. The material is crystallized in tetragonal system with unit cell parameters a = 7.399 Å and c = 6.496 Å and space group I41/amd(141).

Źródło:

Acta Physica Polonica A; 2014, 125, 2; 357-358
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 86.

Tytuł:

Synthesis, Structural and Optical Properties of Mo-Doped ZnO Thin Films

Autorzy:

Mekki, A.
Tabet, N.

Powiązania:

https://bibliotekanauki.pl/articles/1219233.pdf

Data publikacji:

2014-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.15.Aa
78.20.-e
61.05.cp
61.05.cj

Opis:

Transparent zinc oxide thin films doped with molybdenum have been prepared using a DC reactive magnetron sputtering on glass substrates from metallic ZnMo target. The three films, called A, B, and C, had 1.9 at.% Mo, 2.8 at.% Mo and 4.7 at.% Mo, respectively. The composition of the films was determined by X-ray photoelectron spectroscopy. The analysis of Mo 3 $d_{5/2}$ core level spectra indicated that Mo exist in the films in $Mo^{6+}$ oxidation state irrespective of the Mo content in the film. The X-ray diffraction spectrum of film A showed a texture along the 002 orientation, while that of film B showed two peaks, one at $θ ≈ 34.5°$ and the other at $≈ 36.5°$ corresponding to 002 and 101 orientations, respectively. Film C showed two small peaks corresponding to 100 and 110 orientations. Optical measurements showed that all three films had a transmittance of about 80%. The energy band gap showed a linear increase as Mo concentration increases from 3.29 eV to 3.38 eV. The atomic force microscopy image of film A showed a homogeneous morphology of the surface of the film, while the atomic force microscopy images of films B and C showed an inhomogeneous one.

Źródło:

Acta Physica Polonica A; 2014, 125, 2; 365-367
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 87.

Tytuł:

Metals and polymers under mechanical stress: X-ray texture analysis with the use of a tensile stage

Autorzy:

te Nijenhuis, J.
Dadivanyan, N.
Götz, D.

Powiązania:

https://bibliotekanauki.pl/articles/1058087.pdf

Data publikacji:

2016-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
81.05.Bx
81.05.Lg
81.40.-z

Opis:

X-ray diffraction studies have been performed to investigate the change of the preferred orientation of the crystallites as a function of externally applied mechanical stresses. For this purpose, a uniaxial tensile stage was integrated onto a Eulerian cradle in a laboratory X-ray diffraction system. Measurements have been executed while the sample experiences a certain mechanical loading. As example, orientation studies have been performed on metallic as well as on polymer samples.

Źródło:

Acta Physica Polonica A; 2016, 130, 4; 894-897
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 88.

Tytuł:

Hydrogen Release and Microstructure of $MgH_{2}$ Based Composite Powders Containing a Relevant Amount of $LaNi_{5}$

Autorzy:

Abazović, N.
Aurora, A.
Contini, V.
Mancini, M.
Montone, A.
Vittori Antisari, M.

Powiązania:

https://bibliotekanauki.pl/articles/1538131.pdf

Data publikacji:

2010-05

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
61.82.Bg
65.40.-b
68.37.Hk

Opis:

Micro-composite materials based on $MgH_{2}$ with the addition of a relevant amount of $LaNi_{5}$ have been synthesized by reactive ball milling. The powder microstructure has been studied by a combination of X-ray diffraction and scanning electron microscopy, while the decomposition behaviour and the hydrogen release properties have been obtained by differential thermal analysis and thermo-gravimetric measurements. Both temperature scans and constant temperature isotherms have been used to this purpose. Experimental results allow identifying optimum processing condition for synthesis of material that shows the onset of hydrogen release at temperatures as low as 450 K. The decomposition kinetics has been studied by isothermal measurements which show that the whole process cannot be described by just one mechanism limiting the reaction velocity. In fact in the first decomposition step the reaction is kinetically limited by the second phase nucleation, while, for partially decomposed samples the bulk diffusion appears to limit the process. On the basis of the experimental results we propose a mechanism of phase transformation where a percolating network of the two phases is formed.

Źródło:

Acta Physica Polonica A; 2010, 117, 5; 841-848
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 89.

Tytuł:

Equation of State of Zircon-Type $TbVO_{4}$

Autorzy:

Minikayev, R.
Paszkowicz, W.
Werner-Malento, E.
Lathe, C.
Dąbkowska, H.

Powiązania:

https://bibliotekanauki.pl/articles/1538929.pdf

Data publikacji:

2010-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
62.50.-p
61.50.Ks
64.30.Jk

Opis:

High-pressure energy-dispersive X-ray diffraction study were performed on zircon-type phase of terbium orthovanadate, $TbVO_{4}$, in the pressure range up to 7 GPa. For analysis of the collected diffraction spectra, Le Bail refinements were performed. The values of bulk modulus and its pressure derivative ($B_0$ = 121 GPa, B' = 4.1) were obtained from fitting of the second-order Birch-Murnaghan equation of state. The equation of state derived for $TbVO_{4}$, is compared with earlier data based on the Raman spectroscopic studies and with data of several other rare-earth orthovanadates.

Źródło:

Acta Physica Polonica A; 2010, 117, 2; 319-322
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 90.

Tytuł:

Nanoquasicrystalline Phase in Mechanically Alloyed and Heat-Treated $Al_{73}Cu_{11}Cr_{16}$

Autorzy:

Sviridova, T.
Shevchukov, A.
Shelekhov, E.
Diakonov, D.
Gorshenkov, M.
Kaloshkin, S.
Tcherdyntsev, V.
Li, Z.
Fan, G.

Powiązania:

https://bibliotekanauki.pl/articles/1373670.pdf

Data publikacji:

2014-08

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.44.Br
64.70.kd
61.05.cp
61.05.J-

Opis:

X-ray diffraction analysis, scanning and transmission electron microscopy, thermal analysis and measurement of chemical composition were implemented to determine structure, thermal stability and chemical composition of the decagonal quasicrystal in $Al_{73}Cu_{11}Cr_{16}$ alloy produced by long-term mechanical alloying of elemental powders followed by annealing at 700°C. According to the TEM investigation such a technique permits to produce a single-phase nanostructural quasicrystal with grain size about 60 nm. Differential thermal analysis revealed that the decagonal phase does not exist above 923°C and undergoes incongruent two-stage melting coming to the end at 1100°C.

Źródło:

Acta Physica Polonica A; 2014, 126, 2; 599-602
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 91.

Tytuł:

Structural Study and Crystallization Behaviour of $Fe_{62-x} Co_x Nb_8 B_{30}$ Metallic Glasses (x=0, 20)

Autorzy:

Babilas, R.
Kądziołka-Gaweł, M.

Powiązania:

https://bibliotekanauki.pl/articles/1398363.pdf

Data publikacji:

2016-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
64.70.pe
75.50.Bb
75.50.Kj

Opis:

The paper presents the structural analysis of $Fe_{62-x} Co_x Nb_8 B_{3-}$ metallic glasses (x=0, 20) in as-cast and after crystallization state. The studies were performed on metallic glasses of ribbon form: with thickness of 0.05 and 0.06 mm. The structure analysis of the samples in as-cast state and phase analysis of studied alloys after annealing was carried out by the X-ray diffraction methods. Moreover, the Mössbauer spectroscopy was also used to investigate the local structure for examined alloys. The soft magnetic properties examination covered the initial magnetic permeability. The after-effects of magnetic permeability were also conducted.

Źródło:

Acta Physica Polonica A; 2016, 130, 4; 901-904
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 92.

Tytuł:

Effect of Trisodium Citrate on the Morphology and Luminescence Properties of Hydrothermally Synthesized YVO₄ Phosphor

Autorzy:

Zhang, Sa
Liang, Yan
Gao, Xiaoyong

Powiązania:

https://bibliotekanauki.pl/articles/1398668.pdf

Data publikacji:

2016-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

78.55.-m
61.05.cp
68.37.Hk
78.30.-j

Opis:

YVO₄ phosphors with different morphologies were synthesized by trisodium citrate (Na₃cit) surfactant-assisted hydrothermal process. Effects of molar ratio of $\text{cit}^{3-}$ to $Y^{3+}$ and pH value of reaction solution were intensively investigated on the morphologies, structures and luminescence properties of YVO₄ phosphor. The morphologies of the YVO₄ particles can be effectively controlled in strong acidic and strong alkaline environment by affecting the adsorption of $\text{cit}^{3-}$ on the (001) crystal plane of YVO₄. Strong acidic condition resulted into excessive adsorption of $\text{cit}^{3-}$ groups on the YVO₄ phosphor, which annihilated the superior luminescence of YVO₄ phosphors. On the contrary, strong alkaline condition does not result into the adsorption of $\text{cit}^{3-}$ groups. The synthesized YVO₄ phosphor without adsorption of $\text{cit}^{3-}$ groups showed superior luminescence even though the effective control of the morphology in alkaline condition is not so good as in strong acidic condition.

Źródło:

Acta Physica Polonica A; 2016, 129, 1; 79-83
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 93.

Tytuł:

X-ray Diffraction of AuCl Semiconductor Nanocrystals Embedded in NaCl Single Crystals Grown by Czochralski Method

Autorzy:

Zehani, F.
Zaioune, H.

Powiązania:

https://bibliotekanauki.pl/articles/1399819.pdf

Data publikacji:

2013-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
62.23.Pq
64.70.kg
78.67.Bf

Opis:

The AuCl nanocrystals embedded in NaCl single crystals are elaborated using the Czochralski method. The X-ray diffraction has confirmed the formation of the AuCl nanocrystals with a tetragonal structure inside the NaCl matrix. The average radius of the AuCl nanocrystals is estimated using the Scherrer formula.

Źródło:

Acta Physica Polonica A; 2013, 123, 2; 312-313
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 94.

Tytuł:

Influence of Substrate on Crystallographic Quality of AlGaN/GaN HEMT Structures Grown by Plasma-Assisted MBE

Autorzy:

Wierzbicka, A.
Żytkiewicz, Z.
Sobańska, M.
Kłosek, K.
Łusakowska, E.

Powiązania:

https://bibliotekanauki.pl/articles/1431598.pdf

Data publikacji:

2012-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
61.05.cm
81.15.Hi
68.55.-a

Opis:

Results of characterization of AlGaN/GaN high electron mobility transistor (HEMT) structures grown by plasma-assisted molecular beam epitaxy (PAMBE) are reported. High resolution X-ray diffraction (HRXRD) and X-ray reflectivity (XRR) were applied to show that structural properties of the AlGaN/GaN layers strongly depend on the substrate used for growth. It has been found that an additional 10 μm thick HVPE GaN layer grown on a commercial GaN/sapphire substrate significantly improves structural quality of AlGaN layer. However, the best structural parameters have been obtained for the HEMT sample grown on free-standing HVPE bulk GaN substrate.

Źródło:

Acta Physica Polonica A; 2012, 121, 4; 899-902
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 95.

Tytuł:

Monitoring of Heat Treatment Processes by High Energy Synchrotron Radiation

Autorzy:

Klemradt, U.
Rieger, T.
Herrmann, K.
Carmele, D.
Meyer, S.
Lippmann, T.
Stark, A.
Bleck, W.

Powiązania:

https://bibliotekanauki.pl/articles/1490740.pdf

Data publikacji:

2012-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
81.05.Bx
81.30.Kf
81.40.Ef

Opis:

Advanced engineering materials are frequently based on multiphase microstructures, where the decisive step is the heat treatment adjusting the desired microstructure. A typical example are transformation-induced plasticity assisted steels, where the steel grades depend on the phase composition and the deformation-induced transformation of retained austenite into martensite. Usually methods for microstructural characterization are only applied after completion of the heat treatment process and comprise typically microscopy and X-ray analysis with laboratory tubes. Both methods can suffer from artefacts and probe a relatively small surface or volume, respectively. However, in the last decade synchrotron facilities have become available that offer very hard X-rays, which open up new possibilities for the observation of heat treatment processes owing to the unique combination of extremely high intensities with large penetration depths (mm scale). Sophisticated sample environments allow for complex in situ experiments, currently with a time resolution on the order of seconds. Only recently a commercial dilatometer of type Bähr Dil805AD has become available at the HARWI-2 beamline at the HASYLAB. This experimental setup was used for the in situ investigation of the quenching and partitioning process in transformation-induced plasticity steels. The experiments were performed in transmission at a wavelength of 0.0124 nm. The Debye-Scherrer rings were observed arising from statistical grain distributions characteristic for each microstructure. The time-resolved measurements allow conclusions about the phases present in the sample, their lattice parameters, texture and grain size.

Źródło:

Acta Physica Polonica A; 2012, 121, 1; 39-43
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 96.

Tytuł:

Structural and Optical Behaviour οf~Ni Doped CdS Nanoparticles Synthesized by Chemical Co-Precipitation Method

Autorzy:

Siva Kumar, K.
Divya, A.
Sreedhara Reddy, P.
Uthanna, S.
Martins, R.
Elangovan, E.

Powiązania:

https://bibliotekanauki.pl/articles/1492639.pdf

Data publikacji:

2011-12

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.Cp
61.72.-y
78.55.Et
78.67.Bf

Opis:

Pure and Ni (2 at.%) doped cadmium sulfide (CdS) nanoparticles have been synthesized by chemical co-precipitation method at room temperature. Effect of Ni doping on CdS compound semiconductors has been analyzed using X-ray diffractometer, transmission electron microscope, energy dispersive spectroscopy, Raman and optical absorption studies. X-ray diffraction study confirmed the structure of the obtained nanoparticles to be single-phase zinc blende with the diffractions from (111), (220) and (311) planes. Energy dispersive spectroscopy study confirmed the presence of Ni in the CdS lattice. The average particle size obtained from the transmission electron microscopy studies are in agreement with the crystallite size calculated from X-ray diffraction data. The optical studies exhibited a clear red shift of absorption edge as a function of Ni doping.

Źródło:

Acta Physica Polonica A; 2011, 120, 6A; A-052-A-054
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 97.

Tytuł:

Structural, Impedance, Dielectric and Modulus Analysis of $Li_{0.5-x}La_{0.5}Ti_{1-x}Nb_{x}O_3$ (x = 0, 0.05, 0.1, and 0.15)

Autorzy:

Vijaya Babu, K.
Veeraiah, V.
Subba Rao, P.

Powiązania:

https://bibliotekanauki.pl/articles/1418233.pdf

Data publikacji:

2012-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
68.37.Hk
78.30.-j
66.10.Ed

Opis:

The perovskite lithium lanthanum titanate shows high ionic conductivity at room temperature. Doping the lithium lanthanum titanate by niobium preserves the perovskite structure, which is synthesized by ceramic technology at high temperature (1300°C). The X-ray diffraction and scanning electron microscopy results show that the samples exhibit single phase. AC impedance measurements indicate total conductivity of about $8.93 \times 10^{-4}$ S/cm for composition of x = 0.05 at room temperature. The Raman spectra and cyclic voltammetry results of the compound are also reported.

Źródło:

Acta Physica Polonica A; 2012, 122, 4; 688-692
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 98.

Tytuł:

Influence of Ball Milling on the Local Atomic Structure of an Amorphous CoFeSiB Alloy

Autorzy:

Bednarcik, J.
Michalik, S.
Kollar, P.
Roth, S.

Powiązania:

https://bibliotekanauki.pl/articles/1534068.pdf

Data publikacji:

2010-11

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.43.Dq
61.05.cp
64.70.dg
75.30.Kz

Opis:

It follows from experimental observations that ball milling induces substantial changes in an amorphous $Co_{70.3}Fe_{4.7}Si_{10}B_{15}$ (at.%) alloy. X-ray diffraction indicates formation of nanocrystalline bcc-(Co,Fe) phase during ball milling. As a consequence crystallization sequence is altered and the total enthalpy of crystallization reduces with the milling time. Furthermore thermomagnetic measurements reveal that specific magnetization and Curie temperature of amorphous phase are influenced by ball milling.

Źródło:

Acta Physica Polonica A; 2010, 118, 5; 825-826
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 99.

Tytuł:

Design of high-performance PFD-CP for 403MHz CMOS fractional-N frequency synthesizer

Autorzy:

Saleh, S.
Hamdy, G.
Elsemary, H.
Zaki, A.

Powiązania:

https://bibliotekanauki.pl/articles/397720.pdf

Data publikacji:

2017

Wydawca:

Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki

Tematy:

N-PLL
charge pump
current matching
PFD/CP
pompa zasilająca
dokładność prądowa

Opis:

This brief discusses the challenges and employs a novel charge-pump and a PFD/CP linearization technique to improve the performance of a 403MHz fractional-N PLL. Techniques are proposed to improve the linearity of the PLL by forcing the PFD/CP to operate in a linear part of its transfer characteristics, while the charge-pump minimizes the current mismatch between the up and down currents by using feedback. The circuit is designed in 0.13jim CMOS process and consumes a total power of 2.6mW. The simulation results show that the synthesizer has a phase noise of-128dBc/Hz at 1MHz offset.

Źródło:

International Journal of Microelectronics and Computer Science; 2017, 8, 3; 97-100
2080-8755
2353-9607

Pojawia się w:

International Journal of Microelectronics and Computer Science

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 100.

Tytuł:

High-Resolution X-Ray Diffraction Studies on MBE-Grown p-ZnTe/n-CdTe Heterojunctions for Solar Cell Applications

Autorzy:

Wichrowska, K.
Domagala, J.
Wosinski, T.
Chusnutdinow, S.
Karczewski, G.

Powiązania:

https://bibliotekanauki.pl/articles/1375736.pdf

Data publikacji:

2014-11

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
81.05.Dz
81.15.Hi
88.40.jm

Opis:

High-resolution X-ray diffractometer was used to study structural quality, lattice parameters and misfit strain in p-ZnTe/n-CdTe heterojunctions grown by the molecular-beam epitaxy technique on two different (001)-oriented substrates of GaAs and CdTe. The X-ray diffractometer results indicate that the CdTe layers, grown on lattice mismatched GaAs substrate, are partially relaxed, by the formation of misfit dislocations at the interface, and display residual vertical strain of the order of $10^{-4}$. The presence of threading dislocations in the layers effectively limits the efficiency of solar energy conversion in the investigated heterojunctions. Homoepitaxially grown CdTe layers, of much better structural quality, display unexpected compressive strain in the layers and the relaxed lattice parameter larger than that of the substrate. Possible reasons for the formation of that unusual strain are discussed.

Źródło:

Acta Physica Polonica A; 2014, 126, 5; 1083-1086
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

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