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Wyszukujesz frazę "Anisimov, M.V." wg kryterium: Autor

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    Wyświetlanie 1-9 z 9
    Tytuł:
    Anisotropy of Magnetoresistance in HoB₁₂
    Autorzy:
    Khoroshilov, A.
    Krasnorussky, V.
    Bogach, A.
    Glushkov, V.
    Demishev, S.
    Levchenko, A.
    Shitsevalova, N.
    Filipov, V.
    Gabáni, S.
    Flachbart, K.
    Anisimov, M.
    Siemensmeyer, K.
    Sluchanko, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032153.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.27.+a
    Opis:
    We present results of precision measurements of magnetoresistance of isotopically pure Ho¹¹B₁₂ at low temperatures 2÷10 K in magnetic field up to 80 kOe of different orientation to the crystal axes. The data obtained revealed strong anisotropy of magnetoresistance and allowed us to reconstruct magnetic H-T phase diagrams for main crystallographic directions H || [001], [110], and [111]. Analysis of magnetoresistance derivatives allowed to conclude in favor of two main magnetoresistance contributions. Among of them the negative quadratic component is attributed to charge carriers scattering on a magnetic clusters of Ho³⁺ ions (4f component) and positive linear one may be explained in terms of scattering on a spin density waves (5d component).
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 976-978
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anisotropy of the charge transport in GdB₆
    Autorzy:
    Anisimov, M.
    Glushkov, V.
    Bogach, A.
    Demishev, S.
    Samarin, N.
    Samarin, A.
    Shitsevalova, N.
    Levchenko, A.
    Filipov, V.
    Gábani, S.
    Flachbart, K.
    Sluchanko, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1052920.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.15.Gd
    Opis:
    The anisotropy of charge transport was investigated in the antiferromagnetic II state of GdB₆ from precise measurements of transverse magnetoresistance. Based on the data obtained we detected a complicated behavior of magnetoresistance curves which are characterized by the appearance of considerable hysteresis on the field and angular dependences below T_{N2}. Moreover it was shown that the system GdB₆ is sensitive to cooling-warming prehistory. The data analysis allowed to reconstruct magnetic H-T phase diagram of GdB₆ along main crystallographic directions (H||⟨001⟩,⟨110⟩,⟨111⟩) and to propose additional phase transition inside AF II phase at H₁ ≈ 0.5 T.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 973-975
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charge Transport and Magnetism in $Eu_{1-x}Ca_{x}B_6$
    Autorzy:
    Glushkov, V.
    Anisimov, M.
    Batko, I.
    Batkova, M.
    Bogach, A.
    Demishev, S.
    Filipov, V.
    Flachbart, K.
    Kuznetsov, A.
    Sannikov, I.
    Shitsevalova, N.
    Sluchanko, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1534292.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.30.+h
    75.30.Cr
    75.40.-s
    75.47.Gk
    Opis:
    Transport, magnetic and thermal properties of substitutional solid solution $Eu_{1 - x}Ca_{x}B_6$ single crystals (0 ≤ x ≤ 0.244) have been studied at 1.8 ≤ T ≤ 300 K and in magnetic fields up to 8 T. Calcium doping is shown to result in a metal-insulator transition, which occurs at x_{MIT} ≈ 0.2. In vicinity of metal-insulator transition the effect of colossal magnetoresistance is found to be very sensitive to Ca content, the amplitude varying from Δ = [ ρ (0)- ρ (8T)]/ρ(8T) ≈1.4 × $10^2$ to Δ ≈ 7.5 × $10^3$ for 0.14 ≤ x ≤ 0.16. The analysis of magnetic contribution to heat capacity shows that a large amount of magnetic entropy ( ≈ 30%) releases in $Eu_{0.845}Ca_{0.155}B_6$ when moving from the Curie temperature $T_{C}$ ≈ 5.5 K to the characteristic one T* ≈ 30 K. This observation as well as the large amplitude of low field colossal magnetoresistance effect and the deviation of magnetic susceptibility from the Curie-Weiss law detected for x = 0.155 compound in the interval $T_{C}$ ≤ T ≤ T* seem to be associated with magnetic phase separation induced by Ca doping.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 891-892
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charge Transport and Magnetism in $Tm_{0.03}Yb_{0.97}B_{12}$
    Autorzy:
    Glushkov, V.
    Azarevich, A.
    Anisimov, M.
    Bogach, A.
    Demishev, S.
    Dukhnenko, A.
    Filipov, V.
    Flachbart, K.
    Gabáni, S.
    Gavrilkin, S.
    Kondrin, M.
    Shitsevalova, N.
    Sluchanko, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398286.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.15.Gd
    72.15.Jf
    71.27.+a
    Opis:
    Transport and magnetic properties of polycrystalline $Tm_{0.03}Yb_{0.97}B_{12}$ samples were investigated at temperatures 1.8-300 K in magnetic fields up to 9 T. The activated behavior of resistivity, the Hall coefficient and thermopower is described in terms of a narrow gap $ε_g$ ≈ 16.6 meV, which controls the charge transport in $Tm_{0.03}Yb_{0.97}B_{12}$ at T>40 K. The maximum of magnetic susceptibility found at 50 K is shown to be induced by a spin gap Δ ≈ 4.7 meV being close to the half of the spin fluctuation energy in YbB₁₂. Large diffusive thermopower S=AT, A=-29.1 μV/K² and the Pauli susceptibility χ₀ ≈ 7.2×10¯³ emu/mol found below 20 K seem to be associated with the many-body resonance, which corresponds to states with an enhanced effective mass m* ≈ 250m₀ (m₀ - free electron mass). The effective parameters of magnetic centers and the analysis of anomalies favor the nonequivalent states of substitute Tm ions.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 985-987
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Defect Mode in $LaB_{6}$
    Autorzy:
    Anisimov, M.
    Bogach, A.
    Glushkov, V.
    Demishev, S.
    Samarin, N.
    Gavrilkin, S.
    Mitsen, K.
    Shitsevalova, N.
    Levchenko, A.
    Filippov, V.
    Gabani, S.
    Flachbart, K.
    Sluchanko, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1371551.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    65.40.Ba
    Opis:
    The specific heat of high quality $La^{N}B_{6}$ (N=10, 11, natural) single crystals is investigated in a wide range of temperatures 2 - 300 K. The obtained data allow to estimate correctly (i) the electronic γ· T term of specific heat (γ ≈ 2.4 mJ/(mol·$K^{2}$)), (ii) the contribution from quasilocal vibrating mode of $La^{3+}$ ions ($Θ_{E}$ ≈ 150 - 152 K), (iii) the Debye-type term from rigid boron cages ($Θ_{D}$ ≈ 1160± 40 K). Our data also suggest an additional defect-mode component (iv) which may be attributed to a contribution of 1.5% boron vacancies in $LaB_{6}$. The obtained results may be interpreted in terms of formation of two level systems, which appear when $La^{3+}$ ions are displaced from their centrosymmetric positions in the cavities of rigid boron cages, apart from randomly distributed boron vacancies in the $LaB_{6}$ matrix.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 350-351
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Emission of formaldehyde from cured UF resin with filler activated in electromagnetic fields
    Emisja formaldehydu z utwardzonej żywicy mocznikowo-formaldehydowej aktywowanej w polu elektromagnetycznym
    Autorzy:
    Anisimov, M.V.
    Belchinskaya, L.I.
    Siedliacik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/9239.pdf
    Data publikacji:
    2015
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2015, 90
    1898-5912
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hall Effect in $GdB_{6}$
    Autorzy:
    Anisimov, M.
    Bogach, A.
    Glushkov, V.
    Demishev, S.
    Samarin, N.
    Shitsevalova, N.
    Levchenko, A.
    Filippov, V.
    Kuznetsov, A.
    Flachbart, K.
    Sluchanko, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1371548.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.15.Gd
    Opis:
    The Hall effect of $GdB_{6}$ has been studied on high quality single crystals in the temperature range 2-150 K and in magnetic field of 1 T. The obtained data allow to detect anomalies in the antiferromagnetic (AF) phase including (i) a drastic enhancement of negative Hall coefficient below $T_{N1}$ ≈ 15.5 K and (ii) the appearance of an anomalous Hall effect at $T_{N2}$ ≈ 4.7 K. Possible scenarios of the AF ground state formation are discussed.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 348-349
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reentrant Metal-Insulator Transition in $Ca_{1-x}Eu_{x}B_{6}$
    Autorzy:
    Glushkov, V.
    Anisimov, M.
    Baybakov, R.
    Demishev, S.
    Filippov, V.
    Flachbart, K.
    Kuznetsov, A.
    Shitsevalova, N.
    Sluchanko, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1369362.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.30.+h
    72.15.Gd
    75.47.Gk
    Opis:
    Resistivity, Hall and Seebeck effects have been studied on single crystals of $Ca_{1-x}Eu_{x}B_{6}$ (0 ≤ x ≤ 1) at temperatures 2-300 K and in magnetic fields up to 8 T. An insulating ground state is found to be limited by narrow range of Eu doping 0.6 ≤ x ≤ 0.8. This region is characterized by an enhanced colossal magnetoresistance (CMR), which reaches values of ρ(0)/ρ(7T) > $10^{6}$ for x = 0.63 at T < 10 K. Decreasing of Eu content in $Ca_{1-x}Eu_{x}B_{6}$ below x* ≈ 0.6 restores the metallic ground state with moderate resistivity (ρ ~ 1 ÷ 5 mΩ·cm) and CMR amplitude (ρ(0)/ρ(7T) < 7). The second metal-insulator transition (MIT) in $Ca_{1-x}Eu_{x}B_{6}$ is observed beyond the whole conductivity region found earlier in the narrow range of Eu doping (0.7 ≤ x ≤ 0.8). The correlation between the enhanced CMR amplitude, the onset of positive diffusive thermopower and the elevation of anomalous Hall effect, determined for Eu content 0.6 ≤ x ≤ 0.85, favors the idea that a smooth change of band structure is the main factor governing the reentrant MIT in $Ca_{1-x}Eu_{x}B_{6}$.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 294-295
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wear resistance improvement of linear block-polyurethanes under conditions of liquid friction
    Autorzy:
    Panda, Anton
    Anisimov, Volodymyr M.
    Anisimov, Volodymyr V.
    Dyadyura, Konstantin
    Powiązania:
    https://bibliotekanauki.pl/articles/2037428.pdf
    Data publikacji:
    2021
    Wydawca:
    STE GROUP
    Tematy:
    linear block-polyurethane
    wear resistance
    crystallinity
    smooth wear-resistant surface
    electromagnetic radiation
    composite block-polyurethanes
    Opis:
    A significant disadvantage of parts made of linear block polyurethanes under conditions of friction contact in the presence of an aqueous medium is the intensification of hydrolysis processes and decrease in volume strength. It was proposed to slow down the hydrolysis of polyurethanes in three ways: by directed changes in chemical structure, by electromagnetic radiation of different intensities and by creation of composite materials, based on the principle of additional intermolecular crosslinking at the manufacturing and hot processing stages. The conditions for the formation of a smooth wear-resistant surface that protects the material from rapid destruction are revealed.
    Źródło:
    Management Systems in Production Engineering; 2021, 4 (29); 287-293
    2299-0461
    Pojawia się w:
    Management Systems in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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