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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
Artykuł
Tytuł:
Microhardness and the Young Modulus of Thin, MBE-Grown, (Sn,Mn)Te Layers Containing up to 8% of Mn
Autorzy:
Adamiak, S.
Zięba, M.
Minikayev, R.
Reszka, A.
Taliashvili, B.
Szuszkiewicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/1033220.pdf
Data publikacji:
2017-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
62.20.de
62.20.Qp
68.60.Bs
Opis:
The thin layers of (Sn,Mn)Te solid solution were grown by molecular beam epitaxy onto (111)-oriented BaF₂ substrates and characterized by scanning electron microscopy, atomic force microscopy, energy dispersive X-ray spectrometry, and X-ray diffraction methods. The epitaxial character of the growth was confirmed. All the layers exhibited a regular (fcc) structure of the rock-salt type and were (111)-oriented, their thickness was close to about 1 μm. The layers contained up to 8% of Mn. The microhardness and the Young modulus values were determined by the nanoindentation measurements. The Berkovich type of the intender was applied, the maximum applied load was equal to 1 mN. The results of measurements demonstrated a lack of the composition dependence of the Young modulus value. A slight increase of the microhardness value with an increasing Mn content in the (Sn,Mn)Te solid solution was observed.
Źródło:
Acta Physica Polonica A; 2017, 132, 2; 347-350
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positron Annihilation with Electrons of Admixture Atoms in Some Binary Nickel Alloys
Autorzy:
Baranowski, A.
Kostrzewa, M.
Szuszkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/2042168.pdf
Data publikacji:
2005-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
78.30.Er
Opis:
Weighted difference curves have been shortly presented as a proper tool allowing to analyze in another way two-detector Doppler spectra regarding positron annihilation with admixture electrons in some nickel alloys. The analysis of low and middle momentum parts of Doppler spectra for investigated alloys reflects the annihilation of positrons with admixture electrons. There is no distinct signal of annihilations with admixture electrons from the positron lifetime data for well-annealed samples.
Źródło:
Acta Physica Polonica A; 2005, 107, 4; 570-575
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studying of Nickel Alloys with 1 at.% of Ge, Zn, In, Zr and Pb by Positron Annihilation Methods
Autorzy:
Baranowski, A.
Kostrzewa, M.
Szuszkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/2024150.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
78.30.Er
Opis:
The measurements of cold rolled nickel alloys with 1 at.% of Ge, Zn, In, Zr, Pb and additionally Ti and Sb by positron lifetime and Doppler broadening techniques have been done. Monovacancies were a dominating type of defects in the alloys. The authors of the present paper connect the differences between the annihilation parameters of the investigated samples with the existence of the vacancy-impurity atom pairs. A direct proportionality between the vacancy lifetime and the product of vacancy-impurity binding energy and atomic radius of impurity atom has been found.
Źródło:
Acta Physica Polonica A; 2001, 99, 3-4; 329-336
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Test Measurements of Modernized Version of Two-Detector Doppler Spectrometer
Autorzy:
Baranowski, A.
Kostrzewa, M.
Szuszkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/2007881.pdf
Data publikacji:
1999-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
07.85.-m
Opis:
Basing on the electronic analogue modules in adding and subtracting branches of pulses, a modernized two-detector Doppler spectrometer has been constructed using only one multichannel analyser. Doppler spectra for Al, Ni, Ag have been measured. ACARFIT computer program was used to compare the Doppler and angular correlation of annihilation radiation results.
Źródło:
Acta Physica Polonica A; 1999, 95, 4; 439-447
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Health status and dietary patterns in Poland
Zdrowie Polaków a sposób odżywiania się
Autorzy:
Dabrowska, A.
Shulgina, L.
Szuszkiewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/2116935.pdf
Data publikacji:
2021
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
diet
health
eating habits
Polska
farm
dieta
zdrowie
odżywianie się
Polska
Opis:
The main goal of this paper is to evaluate the health status of Poles in the context of their dietary patterns. Results of a desk research study on dietary habits of persons working during the coronavirus pandemic and attitudes of Poles towards meal delivery services provided to the authors by external research institutions were utilized for the purpose of the article. In the framework of practical scientific cooperation, the following reports containing results of research on dietary patterns of people working during the pandemic have been made available for the purpose of this study: “Healthy, speedy or conveniently?” and “Healthy eating”. The results were used with retain of copyright and ethical principles. Data analysis led to the conclusion that people have tended to pay more attention to the food intake as well as spend more time on self-preparation of meals during the pandemic. Based on analysis of the study results, a thesis was formulated that during a pandemic, we pay more attention to what we eat, and we also spend more time preparing meals on our own. Assuming that the population of Poland in 2020 was 38,265 thousand people, it could be stated in the light of the study results that almost 650 thousand Poles were on a well-balanced diet adapted to individual consumer needs.
Celem artykułu jest ocena zdrowia Polaków w kontekście odżywiania się. Wykorzystano badania desk research udostępnione autorkom przez firmy, które badały dwie kwestie, a mianowicie – odżywianie osób pracujących w czasie pandemii oraz stosunek Polaków do diety pudełkowej. W ramach współpracy praktyka-nauka firmy udostępniły autorkom raporty z wynikami badań „Zdrowo, szybko czy wygodnie? – o odżywianiu pracowników w czasie pandemii oraz „Zdrowe odżywianie”. Wyniki wykorzystano z zachowaniem praw autorskich i zasad etycznych. Na podstawie analizy wyników badania postawiono tezę, że w okresie pandemii częściej zwracamy uwagę na to, co jemy, poświęcamy także więcej czasu na samodzielne przygotowanie posiłków. Przyjmując za GUS, że populacja Polski w 2020 roku wynosiła 38 265 tysięcy osób, to w świetle wyników badania można powiedzieć, że prawie 650 tysięcy Polaków miało dobrze zbilansowaną dietę dostosowaną do potrzeb konsumenta.
Źródło:
Acta Scientiarum Polonorum. Oeconomia; 2021, 20, 2; 21-29
1644-0757
Pojawia się w:
Acta Scientiarum Polonorum. Oeconomia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elastic Properties of Zinc Blende MnTe
Autorzy:
Djemia, P.
Roussigné, Y.
Stashkevich, A.
Szuszkiewicz, W.
Gonzalez Szwacki, N.
Dynowska, E.
Janik, E.
Kowalski, B. J.
Karczewski, G.
Bogusławski, P.
Jouanne, M.
Morhange, J.
Powiązania:
https://bibliotekanauki.pl/articles/2038250.pdf
Data publikacji:
2004-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
62.20.Dc
75.50.Pp
78.35.+c
Opis:
The Brillouin light scattering was used to investigate elastic properties of the zinc blende, MBE-grown MnTe layer that was deposited on a (001) GaAs substrate covered by CdTe buffer layer. The three elastic constants of the zinc blende MnTe, namely c$\text{}_{11}$, c$\text{}_{12}$, and c$\text{}_{44}$, were directly determined for the first time from the frequency of the Rayleigh mode, of the pseudo-surface mode, and of the shear horizontal bulk mode traveling parallel to the layer surface. The value of c$\text{}_{11}$ was checked using the frequency of longitudinal bulk waves propagating at different angles from the normal of the layer plane. This value was also independently determined by results of the folding of acoustic phonons, observed for MnTe/CdTe superlattices by the Raman scattering. Finally, the bulk modulus given by the formula B=(c$\text{}_{11}$+2c$\text{}_{12}$)/3 was determined for zinc blende MnTe by ab initio calculations making use of the density functional theory and atomic pseudopotentials; spin polarization of MnTe was taken into account. A satisfactory agreement between theoretical and experimental values was obtained.
Źródło:
Acta Physica Polonica A; 2004, 106, 2; 239-247
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphology and Selected Properties of Core/Shell ZnTe-Based Nanowire Structures Containing ZnO
Autorzy:
Gas, K.
Janik, E.
Zaleszczyk, W.
Pasternak, I.
Dynowska, E.
Fronc, K.
Kolkovsky, V.
Kret, S.
Morhange, J. F.
Reszka, A.
Wiater, M.
Caliebe, W.
Karczewski, G.
Kowalski, B. J.
Szuszkiewicz, W.
Wojtowicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/2047950.pdf
Data publikacji:
2011-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.37.Hk
68.37.Lp
68.65.La
81.07.Vb
Opis:
We report on an approach to fabricate ZnTe-based core/shell radial heterostructures containing ZnO, as well as on some of their physical properties. The molecular beam epitaxy grown ZnTe nanowires constituted the core of the investigated structures and the ZnO shells were obtained by thermal oxidation of ZnTe NWs. The influence of the parameters characterizing the oxidation process on selected properties of core/shell NWs were examined. Scanning electron microscopy revealed changes of the NWs morphology for various conditions of the oxidation process. X-ray diffraction, high resolution transmission electron microscopy, and Raman scattering measurements were applied to reveal the presence of ZnTe single crystal core and polycrystalline ZnO-shell of investigated structure.
Źródło:
Acta Physica Polonica A; 2011, 119, 5; 612-614
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical Properties of ZnCoO Tetrapods and Nanofibers
Autorzy:
Gas, K.
Fronc, K.
Dziawa, P.
Knoff, W.
Wojciechowski, T.
Zaleszczyk, W.
Baranowska-Korczyc, A.
Morhange, J.
Paszkowicz, W.
Elbaum, D.
Karczewski, G.
Wojtowicz, T.
Szuszkiewicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/1791329.pdf
Data publikacji:
2009-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.55.Et
78.67.Bf
81.05.Dz
81.07.Bc
Opis:
In this paper the physical properties of two types of Co-doped ZnO nanostructures: tetrapods and nanofibers grown by a rapid thermal evaporation process and prepared by the electrospinning technique, respectively, were investigated and analyzed. Surface morphology of the samples was examined using scanning electron microscopy. X-ray diffraction measurements showed hexagonal wurtzite crystal structure of both types of investigated nanostructures. Both X-ray diffraction and Raman scattering data confirmed high phase purity of the samples. The magnetic properties studied with the use of the SQUID magnetometer confirmed a presence of ferromagnetic order in analyzed nanostructures. The observed photoluminescence spectra exhibited two groups of lines. The first one, in the ultraviolet spectral range, is due to the optical transitions close to ZnO band gap, the second one in the red region is most probably related to the $Co^{2+}$ d-d internal transitions. The influence of native defects on the optical properties is also shown and discussed. All results reported here lead us to the conclusion that in the mixed crystal nanostructures obtained, a fraction of the $Zn^{2+}$ ions is substituted by $Co^{2+}$ ions.
Źródło:
Acta Physica Polonica A; 2009, 116, 5; 868-870
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electronic Band Structure of Cubic HgS
Autorzy:
Guziewicz, E.
Kowalski, B.
Orłowski, B. A.
Dybko, K.
Witkowska, B.
Szuszkiewicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/1873013.pdf
Data publikacji:
1995-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.Fi
Opis:
Reflectivity spectra of Hg$\text{}_{1-x}$Fe$\text{}_{x}$S (x < 0.04) and HgSe$\text{}_{1-y}$S$\text{}_{y}$ (y < 0.5) mixed crystals were measured in the vacuum ultraviolet energy range from 4 to 12 eV. Information about the electronic band structure of cubic modification of HgS resulting from the above data is analyzed and discussed.
Źródło:
Acta Physica Polonica A; 1995, 87, 2; 395-398
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reflectivity Study of Hg$\text{}_{1-x}$Co$\text{}_{x}$Se Crystals
Autorzy:
Guziewicz, E.
Kowalski, B. J.
Orłowski, B. A.
Szuszkiewicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/1931782.pdf
Data publikacji:
1994-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.Fi
Opis:
The reflectivity spectra of Hg$\text{}_{1-x}$Co$\text{}_{x}$Se (x = 0.0, 0.024, 0.031) crystals were measured in the vacuum ultraviolet photon energy range from 4 to 12 eV to find the influence of Co ions on the valence band electronic structure of the HgSe crystal. The structure of the reflectivity spectra was interpreted in terms of the electronic band structure of the binary material (HgSe) assuming direct allowed interband transitions.
Źródło:
Acta Physica Polonica A; 1994, 86, 5; 875-878
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the Absorption of Annihilation Quanta in Solid and Liquid Ga and BiSn Alloy
Autorzy:
Kluza, A.
Rudzińska, W.
Szuszkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/2025123.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
64.70.Dv
Opis:
Absorption of positron annihilation quanta in Ga and Bi$\text{}_{40}$Sn$\text{}_{60}$ alloy in the solid and the liquid phase was investigated. It was found that the mechanism of absorption of annihilation quanta changes on passing from the solid to the liquid state. Results of measurements for Ga and Bi$\text{}_{40}$Sn$\text{}_{60}$ alloy show that for metals changing their density at the melting point the photopeak profiles are modified: their centers of gravity in liquid phase are displaced with respect to those in the solid phase and the number of counts under the photopeak changes, too.
Źródło:
Acta Physica Polonica A; 2001, 99, 3-4; 407-413
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geopark Karkonosze - georóżnorodność i geoturystyka
Karkonosze Geopark - geodiversity and geotourism
Autorzy:
Knapik, R.
Migoń, P.
Szuszkiewicz, A.
Aleksandrowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/2074854.pdf
Data publikacji:
2011
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Karkonoski Park Narodowy
ochrona przyrody
geostanowiska
Karkonosze National Park
nature protection
geosites
Opis:
The Certificate of a National Geopark was awarded to the Karkonosze National Park, along with its buffer zone, in September 2010. Geodiversity of the Karkonosze Mountains, subject to the comprehensive assessment in 2008-2009, resides mainly in the variety of geological, mineralogical and geomorphological phenomena. In addition, the legacy of mining and mineral prospecting is abundant. Many of the natural phenomena make the Karkonosze Mountains an exceptional area in Poland, and are of outstanding value if considered within the European context. The value of abiotic nature of the Karkonosze is promoted through multiple activities in the field of geotourism and ecological education, including construction of an extensive network of geosites, marked tourist paths, and educational trails with information boards. Further promotion of geodiversity of the Karkonosze is carried out in cooperation with the adjacent Krkonošský narodní park on the Czech side of the mountains, aiming at an establishment of a bilateral Polish-Czech Geopark Krkonoše/Karkonosze, within the framework of the European Geopark Network.
Źródło:
Przegląd Geologiczny; 2011, 59, 4; 311-322, 360
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positron Lifetime in Hostaphan
Autorzy:
Kostrzewa, M.
Bujnarowski, G.
Kluza, A. A.
Szuszkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/2047137.pdf
Data publikacji:
2006-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
71.60.+z
61.41.+e
Opis:
Positron lifetime measurements in hostaphan RNK, used for encapsulation of $\text{}^{22}$Na positron sources, were performed. It was found that the parameter of positron lifetime spectra in hostaphan RNK differ markedly from those for other forms of polyethylene terephthalate. The maximum penetration depth of positrons from RNK hostaphan amounts 0.42 mm. The information gained in the present study is of great importance for experimenters using hostaphan RNK for encapsulation of positron sources.
Źródło:
Acta Physica Polonica A; 2006, 110, 5; 615-620
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fe 3d Contribution to the Valence Band of Cubic Hg$\text{}_{1-x}$Fe$\text{}_{x}$S - Resonant Photoemission Study
Autorzy:
Kowalski, B. J.
Orłowski, B. A.
Szuszkiewicz, W.
Witkowska, B.
Johnson, R. L.
Powiązania:
https://bibliotekanauki.pl/articles/1933837.pdf
Data publikacji:
1995-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
79.60.-i
Opis:
Resonant photoemission spectra of cubic Ηg$\text{}_{0.94}$Fe$\text{}_{0.06}$S were measured for photon energies near to the energy of intra atomic Fe 3p$\text{}^{6}$3d$\text{}^{6}$ → 3p$\text{}^{5}$3d$\text{}^{7}$ transition. The difference between the spectra taken at resonance and antiresonance is presented as a measure of the energy distribution of Fe 3d derived states. The results obtained show that Fe 3d states contribute to the whole valence band with a distinct structure appearing at the band edge.
Źródło:
Acta Physica Polonica A; 1995, 88, 4; 791-794
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
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