Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "5M" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 93
Tytuł:
THz Reflection Spectra of Different Materials, Including Explosives, Measured at a Distance up to 5 m
Autorzy:
Walczakowski, M.
Palka, N.
Czerwiński, A.
Sypek, M.
Szustakowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1398672.pdf
Data publikacji:
2015-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
06.60.Ei
07.57.Hm
07.57.Kp
07.57.Pt
33.20.Ea
Opis:
This work presents a terahertz system designed for the reflection spectroscopy of different materials located at a distance up to 5 m. The source of the radiation is a tunable solid-state optical parametric oscillator, which generates a narrow-band nanosecond pulses in the range of 0.7-2.5 THz. The signal is detected with relatively fast and having big sensitivity hot electron bolometer. The detailed description of each device and the functioning of the experimental setup are provided as well as the methodology of the measurement is explained. Investigations were performed in the 0.7-2.2 THz range in free space with relative humidity of about 40%. The experiment was divided into three series, each of which was carried out with different distance between the examined sample and the system - 1 m, 3 m, and 5 m. Obtained spectra of selected materials, including explosives, are similar to the results received from a purged time domain spectroscopy system. The observed small deviations are connected with fluctuations of the laser wavelength and the instability of the bolometer.
Źródło:
Acta Physica Polonica A; 2015, 127, 3; 689-692
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Vanadium on the Corrosion Behavior of High Manganese Steel in 0.5 M H₂SO₄ Solution
Autorzy:
Gharbi, A.
Maouche, H.
Ghelloudj, O.
Powiązania:
https://bibliotekanauki.pl/articles/1030292.pdf
Data publikacji:
2017-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
82.45.Bb
Opis:
The effect of vanadium on the corrosion behavior of high manganese steel in 0.5 M H₂SO₄ solution has been investigated using scanning electron microscopy, potentiodynamic polarization and impedance spectroscopy. The results have shown that the addition of vanadium to high manganese steel decreases the corrosion current density from 2.1 mA cm¯² to 1.29 mA cm¯². Impedance diagrams show the existence of a high frequency capacitive loop and a low frequency inductive loop. The addition of vanadium increases charge transfer resistance from 5.18 Ω cm² to 12.45 Ω cm².
Źródło:
Acta Physica Polonica A; 2017, 131, 3; 346-348
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anomalous Transport and Thermal Properties of the Solid Solutions U$\text{}_{1-x}$Th$\text{}_{x}$Cu$\text{}_{5}$M (M = Al, Ga, In and Sn)
Autorzy:
Troć, R.
Tran, V. H.
Kaczorowski, D.
Czopnik, A.
Powiązania:
https://bibliotekanauki.pl/articles/2011211.pdf
Data publikacji:
2000-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Mb
72.15.Qm
75.20.Hr
Opis:
UCu$\text{}_{5}$M-type compounds are moderate heavy fermion systems with an antiferromagnetic order below T$\text{}_{N}$ = 18, 16-25, and 25 K for M = Al, (Ga, In), and In, respectively, and a ferrimagnetic order with T$\text{}_{C}$ = 54 K for M = Sn. We present the results of magnetoresistance measurements as a function of temperature and applied magnetic field for the pure compounds and for their solid solutions containing Th, i.e. U$\text{}_{1-x}$Th$\text{}_{x}$Cu$\text{}_{5}$M. Only in the case of UCu$\text{}_{5}$In a substantial positive contribution to the magnetoresistance was observed at low temperatures, as for normal antiferromagnets. For the Al- and Sn-based alloys the magnetoresistance at low temperatures is negative, and its field variation proves the existence of Kondo-type interactions. On Th-substitution the magnetic phase transition is shifted to lower temperature and simultaneously the magnetoresistance becomes less negative. The field dependence of the magnetoresistance of these alloys can be well described by the Coqblin-Schrieffer model. Interestingly, the heat capacity measurements have revealed a general tendency to increase the linear coefficient γ with magnetic dilution of a given UCu$\text{}_{5}$M compound by Th-substitution. This feature reflects an enlargement of the effective mass of conduction electrons with the increase in both the unit cell volume and magnetic dilution. Such a tendency is also observed for the system UCu$\text{}_{5}$(In$\text{}_{1-x}$Ga$\text{}_{x}$), though the unit cell is here suppressed with increasing x. Thus, a similar physical picture is reached in all these systems but involving probably different mechanisms.
Źródło:
Acta Physica Polonica A; 2000, 97, 1; 25-35
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Erbium in Silicon: Possible Light Source for 1.5 μm and Challenge for Defect Physics
Autorzy:
Jantsch, W.
Przybylińska, H.
Powiązania:
https://bibliotekanauki.pl/articles/1946605.pdf
Data publikacji:
1996-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.55.Hx
Opis:
The trivalent erbium ion emits at 1.54 μm, independent of the host crystal and temperature. This fact makes Si:Er an interesting candidate for integrated optics in the optimum wavelength regime for fiber optic communication systems. Recent progress in improving the luminescence yield is reviewed and the limiting factors are discussed, namely: the low solubility of different Er centers, thermal quenching of the luminescence above 100 K, the mechanisms for energy transfer from the host crystal to the Er 4f shell and the process induced parasitic recombination channels.
Źródło:
Acta Physica Polonica A; 1996, 90, 4; 623-633
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
XPS Valence Band Studies of $LaNi_{5-x}Mₓ$ (M = Al, Co; x = 0, 1) Alloy Thin Films
Autorzy:
Skoryna, J.
Marczyńska, A.
Pacanowski, S.
Szajek, A.
Smardz, L.
Powiązania:
https://bibliotekanauki.pl/articles/1386422.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.22.-f
71.20.-b
Opis:
$LaNi_{5-x}Mₓ$ (M = Al, Co) alloy thin films were prepared onto oxidised Si(100) substrates in the temperature range of 285-700 K using UHV magnetron co-sputtering. The surface chemical composition and valence bands of all the alloy thin films were measured in situ, immediately after deposition, transferring the samples to an UHV analysis chamber equipped with X-ray photoelectron spectroscopy. Results showed that the shape of the valence bands measured for the polycrystalline samples is practically the same compared to those obtained theoretically from ab initio band structure calculations. On the other hand, the X-ray photoelectron spectroscopy valence bands of the nanocrystalline thin films (especially LaNi₄Co) are considerably broader compared to those measured for the polycrystalline samples. This is probably due to a strong deformation of the nanocrystals. Therefore, the different microstructure observed in polycrystalline and nanocrystalline alloy thin films leads to significant modifications of their electronic structure.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 430-432
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of Structural Properties of $LiM_xFe_{5-x}O_8$ (M=Al, Cr, Mn), Spinel Solid Solutions
Autorzy:
Darul, J.
Powiązania:
https://bibliotekanauki.pl/articles/1812246.pdf
Data publikacji:
2008-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
82.33.Pt
61.43.-j
61.50.Ks
61.05.cp
Opis:
The structural properties of series spinel oxides with the general formula, $LiM_{0.5}Fe_{4.5}O_8$ (M = Mn, Cr, Al), are investigated. The effect of limited substitution of manganese, chromium and aluminum ions in the lithium ferrite samples on the order-disorder phase transition in the spinel crystal lattice at room temperature is presented. In these materials it is found that the ordered structures have not been isolated as single phases under the present experimental conditions and this fact will certainly influence the magnetic behavior of the compounds. The Rietveld refinements of the synchrotron X-ray diffraction data revealed that transition metal ions hinders the ordering process and $Al^{3+}$ ion was shown to be least effective in removing of order.
Źródło:
Acta Physica Polonica A; 2008, 114, 2; 367-373
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Electronic and Electrochemical Properties of the $LaNi_5$-Based Alloys
Autorzy:
Szajek, A.
Jezierski, A.
Nowak, M.
Jurczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/1810498.pdf
Data publikacji:
2009-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.-b
81.20.Ev
Opis:
Mechanical alloying was used to synthesize $LaNi_5$-type hydrogen storage materials. X-ray diffraction analysis showed that, after 30 h milling, the starting mixture of the elements was decomposed into an amorphous phase. Following the annealing in high purity argon at 700°C for 0.5 h, X-ray diffraction confirmed the formation of the $CaCu_5$-type structures. The nanocrystalline materials were used as negative electrodes for a $Ni-MH_x$ battery. A partial substitution o Ni by Al or Mn in $LaNi_{5-x}M_x$ alloy leads to an increase in discharge capacity. On the other hand, the alloying elements such as Al, Mn and Co greatly improved the cycle life of $LaNi_5$ material. For example, in the nanocrystalline $LaNi_{3.75}Mn_{0.75}Al_{0.25}Co_{0.25}$ powder, discharge capacities of up to 258 mA h $g^{-1}$ (at 40 mA $g^{-1}$ discharge current) were measured. The band structure ab initio calculations showed that 3g sites are preferred by Al, Co, and Mn atoms in the unit cell.
Źródło:
Acta Physica Polonica A; 2009, 115, 1; 247-250
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electron Transport and Point Contact Spectroscopy of Cubic DyCu$\text{}_{5}$
Autorzy:
Nenkov, K.
Idzikowski, B.
Ilkovic, S.
Kačmarčiková, E.
Reiffers, M.
Müller, K.
Powiązania:
https://bibliotekanauki.pl/articles/2013688.pdf
Data publikacji:
2000-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.Eh
72.15.Eb
73.23.Ad
73.40.Jn
Opis:
The electron transport properties and point contact spectra of melt-spun DyCu$\text{}_{5}$ with the cubic phase (structure type AuBe$\text{}_{5}$, space group $F\overline{4}3m$) were investigated. It was found by ac-susceptibility measurements that below a transition temperature T$\text{}_{m}$=6.5 K this phase shows metamagnetism. Between T$\text{}_{m}$ and T$\text{}_{C}$=14.5 K a spontaneous magnetization is found. Our measurements of electrical resistivity confirm the existence of two magnetic phase transitions in the compound. Furthermore, we present point contact spectra of DyCu$\text{}_{5}$-Cu heterocontacts which are directly proportional to the electron-quasiparticle interaction function. Apart from a peak at about 18 meV, which is characteristic of electron-phonon interaction in pure Cu, we observed a series of additional maxima at lower energy, which are connected with the allowed 4f-transitions from the ground state to excited crystalline electric field levels.
Źródło:
Acta Physica Polonica A; 2000, 97, 5; 843-846
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anisotropy of the Diamagnetic Susceptibility in 3,5-dibromo-p-amino and 3,5-dibromo-p-hydroxybenzoic Acids
Autorzy:
Abdel-Kader, M. M.
Powiązania:
https://bibliotekanauki.pl/articles/1920927.pdf
Data publikacji:
1992-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
35.20.My
Opis:
The mean molar susceptibility (χ$\text{}_{M}$) for the two compounds 3,5-dibromo-p-aminobenzoic acid, Br$\text{}_{2}$C$\text{}_{6}$H$\text{}_{2}$(p-NH$\text{}_{2}$)COOH, and 3,5-dibromo-p-hydroxybenzoic acid, Br$\text{}_{2}$C$\text{}_{6}$H$\text{}_{2}$(p-OH)COOH, has been determined. The principal molecular susceptibilities K$\text{}^{∥}$ and K$\text{}^{⊥}$ have been evaluated. The magnetic anisotropy of each of the two compounds was obtained. From the atonic coordinates, as given by the X-ray structure analysis of Br$\text{}_{2}$C$\text{}_{6}$H$\text{}_{2}$(p-NH$\text{}_{2}$)COOH, the crystal susceptibilities (χ$\text{}_{a}$, χ$\text{}_{b}$, and χ$\text{}_{c}$) have been calculated. The magnetic properties are interpreted in the light of the crystal structure.
Źródło:
Acta Physica Polonica A; 1992, 82, 3; 407-411
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Properties of $La_3Ga_{5.5}Ta_{0.5}O_{14}$ Single Crystals Doped with Sm³⁺ and Er³⁺ Ions
Autorzy:
Kaczmarek, S.
Leniec, G.
Berkowski, M.
Kazan, S.
Acikgoz, M.
Powiązania:
https://bibliotekanauki.pl/articles/1398323.pdf
Data publikacji:
2017-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.10.Dg
76.30.Kg
75.30.Gw
75.40.Cx
Opis:
Electron paramagnetic resonance and magnetic susceptibility measurements were performed for two $La_3Ga_{5.5}Ta_{0.5}O_{14}$ single crystals doped with 1.96 at.% of Sm³⁺ ions and 3.8 at.% of Er³⁺ ions. Two magnetically inequivalent sites were found to be responsible for the electron paramagnetic resonance spectra of Sm³⁺ ions. Both sites reveal a low (at least C₂) symmetry with $g_{x}$~0.46, $g_{y}$~0.46 and $g_{z}$~0.52. The symmetry of isolated erbium ions is higher than C₂. From electron paramagnetic resonance and magnetic susceptibility experiments it results that the ground state of Er³⁺ ions is Γ⁶ or Γ⁷. Below 51 K electronic transitions within Γ⁶ doublets take place. Between 51 and 60 K, Γ⁶ to Γ⁷ transitions dominate, while above 60 K mainly transitions within Γ⁷ doublet are active.
Źródło:
Acta Physica Polonica A; 2017, 131, 3; 366-369
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Resonance and Dielectric Studies of a Nonlinear La$\text{}_{3}$Ga$\text{}_{5.5}$Ta$\text{}_{0.5}$O$\text{}_{14}$ Single Crystal Doped with Erbium
Autorzy:
Bodziony, T.
Typek, J.
Orlowski, M.
Majszczyk, J.
Wabia, M.
Berkowski, M.
Ryba-Romanowski, W.
Guskos, N.
Likodimos, V.
Anagnostakis, E. A.
Powiązania:
https://bibliotekanauki.pl/articles/2035732.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.30.Kg
77.22.Ch
Opis:
Single crystal of erbium doped La$\text{}_{3}$Ga$\text{}_{5.5}$Ta$\text{}_{0.5}$O$\text{}_{14}$ grown by the Czochralski method have been investigated by electron paramagnetic resonance and dielectric spectroscopy methods. Dielectric permittivity ε measurements performed in 90-440 K temperature range have shown negligible dispersion for 1 kHz - 1 MHz frequencies and a Curie-Weiss type behaviour with C=47700 K andθ=-340 K. Electron paramagnetic resonance studies have revealed the presence of two different paramagnetic, monoclinic centres. The calculated g factor values are: g$\text{}_{1}$=1.449, g$\text{}_{2}$=11. 534, g$\text{}_{3}$=4.24 for the main M$\text{}_{1}$ centre and g$\text{}_{1}$=1.98, g$\text{}_{2}$=4.169, g$\text{}_{3}$=4.25 for the weaker M$\text{}_{2}$ centre. The temperature dependence of EPR line intensity for centre M$\text{}_{1}$ and M$\text{}_{2}$ is quite different - while lines attributed to M$\text{}_{1}$ could only be observed at low temperatures, below 20 K, lines of M$\text{}_{2}$ centre persisted up to 200 K. The M$\text{}_{1}$ centre is connected with Er$\text{}^{3+}$ ion entering substitutionally into La$\text{}^{3+}$ site, while M$\text{}_{2}$ is probably connected with 3d ions at the same site, unintentionally introduced into the material as an admixture.
Źródło:
Acta Physica Polonica A; 2003, 103, 2-3; 315-322
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impulsive Control and Synchronization of a New 5D Hyperchaotic System
Autorzy:
Kemih, K.
Bouraoui, H.
Messadi, M.
Ghanes, M.
Powiązania:
https://bibliotekanauki.pl/articles/1399676.pdf
Data publikacji:
2013-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.Gg
05.45.Xt
Opis:
This paper investigates the control and the synchronization of a new 5D hyperchaotic system. Based on the impulsive control theory, some new and less conservative criteria for the global exponential stability and asymptotical stability of impulsively controlled 5D hyperchaotic system, are obtained with varying impulsive interval. Finally, numerical simulations are given to demonstrate the effectiveness of the proposed control and synchronization methodology.
Źródło:
Acta Physica Polonica A; 2013, 123, 2; 193-195
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Computational Study on (E)-3-(2-Chlorostyryl)-5,5-Dimethylcyclohex-2-Enone
Autorzy:
Eryilmaz, S.
Gül, M.
Kozak, Z.
İnkaya, E.
Powiązania:
https://bibliotekanauki.pl/articles/1031251.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
31.15.E
31.15.es
Opis:
A new isophorone derivative, (E)-3-(2-chlorostyryl)-5,5-dimethylcyclohex-2-enone, was synthesized by aldol reactions and characterized by single crystal diffraction method to determine the molecular structure. The computational analysis based on density functional theory with Becke's three-parameter hybrid functional was carried out using Lee, Yang and Parr correlation functional (B3LYP)/6-311++G(d,p), to investigate the structural parameters, the values of dipole moment, the total polarizability, the first-order hyperpolarizability for the non-linear optical behaviour and the thermodynamic parameters at different temperatures of the compound.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 738-741
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electronic Structure of Zinc-Blende Zn$\text{}_{0.5}$Co$\text{}_{0.5}$Se: Theoretical Study
Autorzy:
Hołda, A.
Markowski, R.
Dębowska, D.
Kisiel, A.
Zimnal-Starnawska, M.
Piacentini, M.
Zema, N.
Lama, F.
Powiązania:
https://bibliotekanauki.pl/articles/1950806.pdf
Data publikacji:
1996-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.-b
71.20.Cf
71.70.-d
Opis:
In this paper we present partial densities of states for spin-polarized antiferromagnetic phase of Zn$\text{}_{0.5}$Co$\text{}_{0.5}$Se as well as schematic layouts of the bands, obtained using the ab initio self-consistent semi-relativistic linear muffin tin orbital method. We also present, from theoretical point of view, the analysis of influence of the transition metal cobalt on the electronic structure of a pure ZnSe.
Źródło:
Acta Physica Polonica A; 1996, 90, 4; 817-820
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electronic Structure of Zinc-Blende Zn$\text{}_{0.5}$V$\text{}_{0.5}$Se: Theoretical Study
Autorzy:
Markowski, R.
Hołda, A.
Dębowska, D.
Kisiel, A.
Zimnal-Starnawska, M.
Piacentini, M.
Zema, N.
Lama, F.
Powiązania:
https://bibliotekanauki.pl/articles/1934068.pdf
Data publikacji:
1995-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.-b
71.70.-d
71.20.Cf
Opis:
In this paper we present a comprehensive study of electronic structure of Zn$\text{}_{0.5}$V$\text{}_{0.5}$Se from the theoretical point of view. Partial and total density of states for spin-polarized antiferromagnetic phase of Zn$\text{}_{0.5}$V$\text{}_{0.5}$Se as well as schematic layouts of the bands have been obtained using the ab initio self-consistent semirelativistic linear muffin-tin orbital method.
Źródło:
Acta Physica Polonica A; 1995, 88, 5; 1023-1027
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 93

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies