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Wyszukujesz frazę "Fedorov, M." wg kryterium: Autor


Wyświetlanie 1-6 z 6
Tytuł:
Strong-Field Phenomena in Atoms - Quasiclassical Approach
Autorzy:
Fedorov, M. V.
Powiązania:
https://bibliotekanauki.pl/articles/1931525.pdf
Data publikacji:
1994-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.80.Fb
32.80.Rm
Opis:
A quasiclassical (WKB) approach is used to construct a theory of atomic transitions induced by a strong light field. This approach is used to find the "Coulomb-Volkov" solutions of the Schrödinger equation in which both the Coulomb and light fields are taken into account. These solutions are shown to be applicable in a region of low light frequencies, low electron energies and angular momenta. The found solutions are used to describe two kinds of processes: strong-field photoionization from highly excited (Rydberg) atomic levels, and field-assisted electron-ion scattering. In the photoionization problem the strong-field complex quasi-energies of an atom are found. A problem of the strong-field stabilization of an atom, as well as the expected behavior of the ionization time in its dependence on the light field strength are discussed.
Źródło:
Acta Physica Polonica A; 1994, 86, 1; 235-243
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Initial-value Problem in the Quasi-classical Theory of Strong-field Photoionization of Rydberg Atoms
Autorzy:
Tikhonova, O. V.
Fedorov, M. V.
Powiązania:
https://bibliotekanauki.pl/articles/1968511.pdf
Data publikacji:
1998-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.80.Fb
32.80.Rm
Opis:
Photoionization of Rydberg atoms is considered in the quasi-classical (WKB) approach. The total nonlinear strong-field ionization rate is found and investigated. The time of ionization, as a function of a growing field-strength amplitude, is shown to approach asymptotically the Kepler period t$\text{}_{k}$. Interference stabilization of Rydberg atoms is confirmed to exist in the case of short pulses (shorter than the Kepler period).
Źródło:
Acta Physica Polonica A; 1998, 93, 1; 77-85
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calcium Fluoride Barrier Layer in Tunnel Emitter Phototransistor
Autorzy:
Illarionov, Y.
Vexler, M.
Suturin, S.
Fedorov, V.
Sokolov, N.
Powiązania:
https://bibliotekanauki.pl/articles/1490944.pdf
Data publikacji:
2012-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.40.Qv
73.40.Gk
73.61.Ng
Opis:
Owing to the optimized growth technology of the 1-2 nm calcium fluoride films on n-(111)-silicon, metal/tunnel-insulator/semiconductor phototransistors have been fabricated by the molecular beam epitaxy at the temperature 250°C. The characteristics of these transistors were measured in a wide range of voltages, and the proofs for current gain were found throughout the investigated range. The gain value exceeds $10^3$ approaching the theoretically estimated value in this system. The stability and reproducibility of the device characteristics were satisfactory. The results support the candidacy of calcium fluoride for being a vital dielectric in silicon-based functional electronics.
Źródło:
Acta Physica Polonica A; 2012, 121, 1; 158-161
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Properties of EuS/Co Multilayers on KCl and BaF₂ Substrates
Autorzy:
Szot, M.
Kowalczyk, L.
Story, T.
Domukhovski, V.
Knoff, W.
Gas, K.
Volobuev, V.
Sipatov, A.
Fedorov, A.
Powiązania:
https://bibliotekanauki.pl/articles/1811998.pdf
Data publikacji:
2008-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Et
75.75.+a
Opis:
Magnetic and structural properties of EuS/Co multilayers were studied by magnetic optical Kerr effect and SQUID magnetometry techniques and by X-ray diffraction method. The multilayers containing monocrystalline, ferromagnetic EuS layer (thickness 35-55 Å) and metallic Co layer (thickness 40-250 Å), were grown on KCl (001) and BaF₂ (111) substrates using high vacuum deposition technique employing electron guns for Co and EuS. All investigated EuS/Co multilayers exhibit ferromagnetic properties at room temperature due to Co layer with the ferromagnetic transition in EuS layer clearly marked upon cooling below 16 K. In EuS/Co/EuS trilayers grown on KCl substrate the antiferromagnetic alignment of magnetization vectors of Co and EuS layers was experimentally observed as a characteristic low field plateau on magnetization hysteresis loops and a decrease in multilayer magnetization below 16 K. In Co/EuS bilayers the characteristic temperature dependent shift of magnetization loops was found due to exchange bias effect attributed to the CoO/Co interface formed by the oxidation of the top Co layer.
Źródło:
Acta Physica Polonica A; 2008, 114, 5; 1397-1402
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interlayer Exchange Coupling in Semiconductor EuS-PbS Ferromagnetic Wedge Multilayers
Autorzy:
Kowalczyk, L.
Wrotek, S.
Dziawa, P.
Osinniy, V.
Szot, M.
Story, T.
Sipatov, A. Yu.
Volobuev, V. V.
Fedorov, A. G.
Powiązania:
https://bibliotekanauki.pl/articles/2046924.pdf
Data publikacji:
2006-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.20.Ck
75.30.Et
Opis:
Antiferromagnetic interlayer coupling between ferromagnetic layers of EuS via nonmagnetic PbS spacer layer was experimentally studied in EuS-PbS wedge multilayers grown on KCl (001) substrates with EuS thickness of 6 nm and PbS thickness varying in the wedges in the range 0.3-6 nm (i.e. n=1-20 monolayers). Measurements of magnetic hysteresis loops of EuS-PbS multilayers performed in the temperature range 5-30 K by superconducting (SQUID) and magneto-optical magnetometers revealed a rapid increase in saturation magnetic field in multilayers with PbS spacer thinner than about 1.5 nm. It shows a monotonic increase in interlayer coupling strength with a decreasing PbS spacer thickness, in qualitative agreement with 1/2$\text{}^{n}$ dependence predicted theoretically for semiconductor magnetic superlattices.
Źródło:
Acta Physica Polonica A; 2006, 110, 2; 225-231
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Properties of EuS-SrS Semiconductor Multilayer Structures
Autorzy:
Szot, M.
Kowalczyk, L.
Deptuła, P.
Domukhovski, V.
Osinniy, V.
Smajek, E.
Szczerbakow, A.
Sipatov, A. Yu.
Volobuev, V. V.
Fedorov, A. G.
Story, T.
Powiązania:
https://bibliotekanauki.pl/articles/2047716.pdf
Data publikacji:
2007-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.20.Ck
75.30.Et
Opis:
Magnetic and structural properties of EuS-SrS semiconductor multilayers were studied by SQUID and magneto-optical Kerr effect magnetometry techniques and by X-ray diffraction method. The multilayers composed of monocrystalline, lattice matched ferromagnetic EuS layers (thickness 35-50Å) and nonmagnetic SrS spacer layers (thickness 45-100Å) were grown epitaxially on KCl (001) substrates with PbS buffer layer. Ferromagnetic transition in EuS-SrS multilayers was found at the Curie temperature T$\text{}_{c}$=17 K. The multilayers exhibit only weak in-plane magnetic anisotropy with [110] easy magnetization axis. Coercive field of EuS-SrS multilayers shows a linear increase with decreasing temperature. Magneto-optical mapping of magnetic hysteresis loops of the multilayers revealed good spatial homogeneity of their magnetic properties.
Źródło:
Acta Physica Polonica A; 2007, 112, 2; 419-424
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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