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 "(A.K.)." wg kryterium: Autor

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 783
Tytuł:
Curie Temperature of Disordered Alloys
Autorzy:
Arzhnikov, A. K.
Dobysheva, L. V.
Powiązania:
https://bibliotekanauki.pl/articles/1964783.pdf
Data publikacji:
1997-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Fd
75.50.Bb
75.10.Lp
Opis:
The concentrational behavior of the Curie temperature that describes the experiments for disordered alloys Fe-M (M = Al, Si, Ga, Sn) at concentrations of M lower than 10 at.% was obtained in the framework of the Hubbard model. The influence of the spin and charge fluctuations was investigated.
Źródło:
Acta Physica Polonica A; 1997, 92, 2; 419-422
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantum Tunnelling of Magnetization in Uniaxial Magnetic Clusters
Autorzy:
Dobrovitski, V. V.
Rakhmetov, E. R.
Barbara, B.
Zvezdin, A. K.
Powiązania:
https://bibliotekanauki.pl/articles/1964832.pdf
Data publikacji:
1997-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.45.+j
75.50.Tt
Opis:
In the present paper the uniaxial cluster, such as Mn$\text{}_{12}$, is considered. For explanation of magnetization tunnelling in such a system, we propose to account for vibron excitations of Mn$\text{}_{12}$ cluster; the presence of vibron can reduce the symmetry of the system and create the second-order anisotropy in the basal plane, necessary for tunnelling. Using the fact that the vibron frequency is low in comp arison with magnetic moment precession rate, we calculated the rate of magnetization tunnelling within WKB-approximation using the instanton techniques. The exact analytic instanton solution was obtained for arbitrary values of the external field, uniaxial and transversal anisotropy. We discuss also the mechanisms of quantum oscillations of the parameters of tunnelling.
Źródło:
Acta Physica Polonica A; 1997, 92, 2; 473-476
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Refractive Indices, Order Parameter and Optical Transmittance Studies of a Nematic Liquid Crystal Mixture
Autorzy:
Singh, A. K.
Manohar, R.
Shukla, J. P.
Biradar, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/2047089.pdf
Data publikacji:
2006-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.30.-v
42.70.Df
Opis:
Measurements of ordinary refractive index, birefringence, density, and order parameter were made on a technologically important nematogen and the data obtained for its nematic and isotropic phase were reported. A modified wedge method was used for the measurement of the birefringence (δ n). The nematic-isotropic phase transition temperature matches very well as is exhibited from the value of refractive indices and densities obtained using different techniques. The optical anisotropy and density data were used to determine the order parameter and principal polarizability of the nematic mixture using the Vuks approach and their temperature dependence was discussed. The macroscopic order parameter was obtained and compared with microscopic order parameter. These two values agree very well.
Źródło:
Acta Physica Polonica A; 2006, 110, 4; 485-493
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deep Electron Traps in CdTe:In Films Grown by Molecular Beam Epitaxy
Autorzy:
Żakrzewski, A. K.
Dobaczewski, L.
Karczewski, G.
Wojtowicz, T.
Kossut, J.
Powiązania:
https://bibliotekanauki.pl/articles/1934051.pdf
Data publikacji:
1995-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.55.Ln
73.61.Ga
Opis:
N-type indium doped CdTe grown on n$\text{}^{+}$-GaAs by molecular beam epitaxy has been studied by the standard deep level transient spectroscopy and the isothermal Laplace-transform deep level transient spectroscopy. It was found that the Cd/Te flux ratio strongly influences the deep level transient spectroscopy results. The unusual temperature dependence of the electron emission rate in films grown at nearly stoichiometric conditions may point out that the observed defect is resonant with the conduction band.
Źródło:
Acta Physica Polonica A; 1995, 88, 5; 961-964
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and Electrical Properties of La-Pr-Mn-O Thin Films and Heterostructures
Autorzy:
Butkutė, R.
Anisimovas, F.
Oginskis, A. K.
Steikūnienė, A.
Devenson, J.
Vengalis, B.
Powiązania:
https://bibliotekanauki.pl/articles/2047223.pdf
Data publikacji:
2007-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.-i
71.30.+h
73.50.-h
75.70.Pa
Opis:
In this paper we report the results of synthesis and study of both ceramic samples and thin films of electronically doped La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$ and related heterostructures composed of La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$ and p-type La$\text{}_{0.67}$Ca$\text{}_{0.33}$MnO$\text{}_{3}$. The ceramic La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$ samples were prepared by a conventional solid state reaction technique. Single phase La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$ thin films and La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$/La$\text{}_{0.67}$ Ca$\text{}_{0.33}$MnO$\text{}_{3}$ heterostructures were grown on lattice-matched perovskite NdGaO$\text{}_{3}$ substrates by pulsed laser deposition. Electron doping was indicated both for ceramic La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$ samples and thin films from thermopower data. Both ceramic samples and thin films of La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$ demonstrated resistivity of about 10 mΩ cm at 300 K and semiconductor-like resistance vs. temperature behavior with cooling down to 78 K. Meanwhile, the resistance of the La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$/La$\text{}_{0.67}$Ca$\text{}_{0.33}$MnO$\text{}_{3}$ interface showed an anomalous peak at 185 K. A series of post-deposition annealing experiments demonstrated a crucial role of annealing temperature and ambience on both electrical and magnetic properties of La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$ material and the heterostructures.
Źródło:
Acta Physica Polonica A; 2007, 111, 1; 111-115
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
EPR and Spectral Studies of a Molecular and Crystal Structure of Cu (3,5-dimethylpyridine)$\text{}_{3}$(NO$\text{}_{3}$)$\text{}_{2}$
Autorzy:
Hoffmann, S. K.
Goher, M. A. S.
Hilczer, W.
Goslar, J.
Hafez, A. K.
Powiązania:
https://bibliotekanauki.pl/articles/1930620.pdf
Data publikacji:
1994-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.20.Ea
61.66.-f
76.30.Da
Opis:
X-band single crystal EPR, IR and UV-VIS data are used to deduce a molecular and crystal structure of a new compound with a chemical formula Cu(3,5-dimethylpyridine)$\text{}_{3}$(NO$\text{}_{3}$)$\text{}_{2}$. EPR shows that four magnetically inequivalent molecules exist in the crystal unit cell of C$\text{}_{4v}$ symmetry. IR spectra suggested that both monodentate and bidentate NO$\text{}_{3}$-groups exist in the crystal. A most probable Cu(II) complex geometry with d$\text{}_{x²-y²}$ ground state is a square pyramid with three nitrogens from 3,5-dimethylpyridine molecules and one oxygen from monodentate nitrato group in a basal plane and an oxygen from NO$\text{}_{3}$-group in apical position. There exists a chemical contact between complexes as it is indicated by the exchange interaction with |J| ≤ 1 cm$\text{}^{-1}$. It suggests that square pyramid complexes are arranged in polymeric chains with semi-coordination of bidentate NO$\text{}_{3}$-group to the adjacent Cu(II) ion. An extended analysis of an exchange averaging effect between EPR lines from two and four Cu(II) sites is presented with equations relating molecular and crystal g-factors.
Źródło:
Acta Physica Polonica A; 1994, 85, 3; 517-530
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Precipitates in Cd$\text{}_{1-x}$Ni$\text{}_{x}$Se Crystals Grown by the Bridgman Method
Autorzy:
Kachniarz, J.
Dynowska, E.
Miotkowska, S.
Paszkowicz, W.
Miotkowski, I.
Ramdas, A. K.
Powiązania:
https://bibliotekanauki.pl/articles/1921645.pdf
Data publikacji:
1992-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.70.Wp
61.55.Hg
81.10.Fq
Opis:
Single crystals of Cd$\text{}_{1-x}$Ni$\text{}_{x}$Se alloys (x ranging from 0 to 0.075) were investigated using electron microprobe and X-ray diffraction. The analysis shows the presence of Ni-Se precipitates. The solubility limit of Ni is estimated to be 0.008.
Źródło:
Acta Physica Polonica A; 1992, 82, 5; 725-728
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transmission SecondHarmonic Generation in Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te at 1.064 µm
Autorzy:
Koziarska, B.
Kowalczyk, L.
Suchocki, A.
Wojtowicz, T.
Zakrzewski, A. K.
Karczewski, G.
Janik, E.
Kossut, J.
Powiązania:
https://bibliotekanauki.pl/articles/1873081.pdf
Data publikacji:
1995-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Ky
68.70.+w
Opis:
Second harmonic generation, created by nanosecond Nd : YAG laser pulses at 1.064 µm with relatively low intensity in Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te bulk crystals and thin layers was measured in transmission geometry. The effect practically occurs in a very thin surface layer of the material and it is used as a relatively straightforward method of layer quality characterization. It is shown that the angular dependence of the second harmonic generation intensity in thin layers of CdTe with good crystallographic (and optical) quality agrees very well with the theory in contrary to the samples with some distortions from the ideal structure which exhibits large distortions from the theory.
Źródło:
Acta Physica Polonica A; 1995, 87, 2; 423-426
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature Study of Photoluminescence from Deep CdTe/Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te Quantum Wells
Autorzy:
Kutrowski, M.
Wojtowicz, T.
Karczewski, G.
Kopalko, K.
Zakrzewski, A. K.
Janik, E.
Grasza, K.
Łusakowska, E.
Kossut, J.
Powiązania:
https://bibliotekanauki.pl/articles/1876361.pdf
Data publikacji:
1995-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.20.Dx
78.55.Et
Opis:
The photoluminescence studies in CdTe/CdMnTe quantum wells are reported in the temperature range 10-300 K. The MnTe concentration in the barriers is x = 0.3, 0.5, 0.63 and 0.68. Thus the potential wells in our samples are very deep, of the order of ≈ 800 meV in the conduction band and ≈ 200 meV in the valence band in the case of the x = 0.68 sample. In spite of the large lattice mismatch (related to high x value) between the wells and the barriers the observed line widths are as narrow as 2 meV in the case of 100 Å. Clear manifestations of internal strain are observed. In particular, the temperature coefficient of the luminescence energies shows strong dependence on the width of wells.
Źródło:
Acta Physica Polonica A; 1995, 87, 2; 500-504
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two-Electron DX State in CdTe:In
Autorzy:
Skierbiszewski, C.
Wiśniewski, P.
Litwin-Staszewska, E.
Suski, T.
Wilamowski, Z.
Zakrzewski, A. K.
Karczewski, G.
Jantsch, W.
Powiązania:
https://bibliotekanauki.pl/articles/1952096.pdf
Data publikacji:
1996-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.55.Gs
73.61.Ga
Opis:
In this paper we investigate electron emission/capture from/to the DX state of indium in CdTe by means of high pressure freeze-out cycle and steady-state photo-conductivity experiments. The results indicate that the DX state is occupied by two electrons. A comparison with deep level transient spectroscopy data shows that two-electron emission occurs at low temperatures, while one-electron emission takes place at high temperatures.
Źródło:
Acta Physica Polonica A; 1996, 90, 5; 927-930
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrical and Structural Properties of Ohmic Contacts to n-Type and High Resistivity CdTe
Autorzy:
Kamińska, E.
Piotrowska, A.
Guziewicz, M.
Gierlotka, S.
Papis, E.
Łusakowski, J.
Szadkowski, K.
Kwiatkowski, S.
Dietl, T.
Grabecki, G.
Jaroszyński, J.
Karczewski, G.
Zakrzewski, A. K.
Powiązania:
https://bibliotekanauki.pl/articles/1873052.pdf
Data publikacji:
1995-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.40.Ns
Opis:
The interaction between CdTe and In during the formation of an ohmic contact has been investigated. Emphasis is placed on the study of the effect of thermally induced sublimation of cadmium on electrical properties of contacts. Presented results prove the effectiveness of cap annealing and rapid thermal processing in fabrication of improved ohmic contacts with limited Cd losses during the contacting procedure.
Źródło:
Acta Physica Polonica A; 1995, 87, 2; 411-414
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Adding of V and Co Atoms on the Spin Glass Transition Temperature of Fe$\text{}_{0.7-x}$M$\text{}_{x}$Al$\text{}_{0.30}$ Alloys
Autorzy:
Azez, K. A.
Powiązania:
https://bibliotekanauki.pl/articles/2035747.pdf
Data publikacji:
2003-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Bb
Opis:
Magnetization measurements on zero field cooled (M$\text{}_{ZFC}$) and field cooled (M$\text{}_{FC}$) with temperature T were made on Fe$\text{}_{0.7-x}$M$\text{}_{x}$Al$\text{}_{0.30}$ alloys (where M = Co or M = V). Compared to Co and V free alloy Fe$\text{}_{0.7}$Al$\text{}_{0.30}$, our results revealed that an addition of small amount of M = Co with 0≤ x≤0.10 shows linear decrease in the transition temperature T$\text{}_{f}$ as x increases. Addition of small amount of M = V with 0≤ x≤0.1 shows gradual decrease in T$\text{}_{f}$ with increasing x. The relative changes in T$\text{}_{f}$ show that an addition of V atoms is of more significance than addition of Co atoms. There is a twofold decrease which could be attributed to the ferromagnetic nature of Co atoms and to the random fields.
Źródło:
Acta Physica Polonica A; 2003, 103, 5; 471-476
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure of an Al-Fe-Ni Decagonal Quasicrystal Studied by Cs-Corrected STEM
Autorzy:
Yasuhara, A.
Yamamoto, K.
Yubuta, K.
Hiraga, K.
Powiązania:
https://bibliotekanauki.pl/articles/1373700.pdf
Data publikacji:
2014-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.66.-f
Opis:
The structure of an Al-Fe-Ni decagonal quasicrystal with two quasiperiodic planes along the periodic axis in an $Al_{72}Ni_{24}Fe_4$ alloy has been examined by spherical aberration (Cs)-corrected scanning transmission electron microscopy with high-angle annular dark-field and annular bright-field techniques. The transition-metal atoms and mixed sites (MSs) of Al and transition-metal atoms are represented as separated bright dots in the observed high-angle annular dark-field scanning transmission electron microscopy images, and consequently the arrangements of transition-metal atoms and mixed sites on the two quasiperiodic planes can be directly determined. The transition-metal atoms are arranged on a pentagonal tiling of an edge-length of 0.76 nm. The close examination of observed annular bright-field- and high-angle annular dark-field scanning transmission electron microscopy images indicates the existence of large decagonal columnar clusters with 3.2 nm diameter, and their arrangement on pentagonal, thin rhombic and squashed hexagonal tiles with an edge-length of 3.2 nm. The arrangements of transition-metal atoms in these three tiles are placed on an ideal pentagonal tiling with an edge-length of 3.2 nm, which is generated by the projection of a five-dimensional hyper-cubic lattice. The vertices are denoted by 5D hyper-cubic indices and then they are projected on the occupation domains in perpendicular space. The arrangement of Al atoms as well as transition-metal atoms and mixed sites in the large decagonal atom cluster with about 3.2 nm diameter is interpreted from the observed high-angle annular dark-field- and annular bright-field scanning transmission electron microscopy ABF-STEM images.
Źródło:
Acta Physica Polonica A; 2014, 126, 2; 637-640
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Al/Steel Bimetal Composite Fabrication by Vacuum Assisted Solid Mould Investment Casting
Autorzy:
Guler, K.
Kisasoz, A.
Karaaslan, A.
Powiązania:
https://bibliotekanauki.pl/articles/1377846.pdf
Data publikacji:
2014-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.30.Fb
81.30.-t
81.20.-n
Opis:
Bimetal composites are a group of promising engineering materials with high developing and service potential. Especially in many fields they can be a powerful low cost alternative to metal-ceramic composites. The most commonly encountered type of these composites is steel reinforced aluminium matrix composites which stand out with high wear and abrasion resistance. Significant fabrication processes of metal/metal composites are based on liquid metal techniques. In this study, Al/steel composite specimens were produced by using vacuum assisted solid mould investment casting technique. A7075 wrought aluminium alloy were infiltrated into steel preforms, which were produced with 304 stainless steel and H13 hot-work tool steel turnings, in the plaster based solid investment casting moulds. Microstructure observations, HV microhardness measurements, scanning electron microscopy and energy dispersive X-ray spectroscopy analysis were carried out for characterization.
Źródło:
Acta Physica Polonica A; 2014, 126, 6; 1327-1330
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Light Polarization on Reorientation Nonlinearity in Nematic Liquid Crystals
Autorzy:
Brzdąkiewicz, K. A.
Karpierz, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/2035686.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.-k
42.70.Df
Opis:
Nematic liquid crystals are characterized by a giant optical nonlinearity which has its origin in the molecular reorientational phenomenon. Uniqueness of this nonlinear mechanism causes that response of the medium is dependent on many conditions. Among various circumstances, both an initial alignment of liquid crystal cell and geometry of the system are very important, but in this paper a significant role of light polarization in nonlinear effects observed in nematics is emphasized. Additionally, it is underlined that dependence on light polarization does not have only trivial aspect of initial conditions. More complex seems to be the fact that due to the high optical anisotropy of the medium the state of light polarization is changing on the way of beam propagation. As a consequence, the modifications of molecular orientation in the liquid crystal cell are strongly dependent upon light polarization.
Źródło:
Acta Physica Polonica A; 2003, 103, 2-3; 195-205
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 783

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