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Advanced characterization of FeNi-based films for the development of magnetic field sensors with tailored functional parameters / S. V. Komogortsev, I. G. Vazhenina, S. A. Kleshnina [et al.] // Sensors. - 2022. - Vol. 22, Is. 9. - Ст. 3324, DOI 10.3390/s22093324. - Cited References: 35. - This research was funded by the Russian Science Foundation (RSF), project no. 22-29-00980, https://rscf.ru/en/project/22-29-00980/ (accessed on 20 March 2022) . - ISSN 1424-8220
Кл.слова (ненормированные):
magnetic field sensors -- thin films -- multilayered structures -- magnetic anisotropy -- anisotropy distribution -- ferromagnetic resonance -- magnetoimpedance -- high frequency applications
Аннотация: Magnetometry and ferromagnetic resonance are used to quantitatively study magnetic anisotropy with an easy axis both in the film plane and perpendicular to it. In the study of single-layer and multilayer permalloy films, it is demonstrated that these methods make it possible not only to investigate the average field of perpendicular and in-plane anisotropy, but also to characterize their inhomogeneity. It is shown that the quantitative data from direct integral and local measurements of magnetic anisotropy are consistent with the direct and indirect estimates based on processing of the magnetization curves. The possibility of estimating the perpendicular magnetic anisotropy constant from the width of stripe domains in a film in the transcritical state is demonstrated. The average in-plane magnetic anisotropy field of permalloy films prepared by magnetron sputtering onto a Corning glass is almost unchanged with the thickness of a single-layer film. The inhomogeneity of the perpendicular anisotropy field for a 500 nm film is greater than that for a 100 nm film, and for a multilayer film with a total permalloy thickness of 500 nm, it is greater than that for a homogeneous film of the same thickness.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Physics, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Magnetism of Solid State, Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg, 620002, Russian Federation
Laboratory of Advanced Magnetic Materials, Institute of Metal Physics UD RAS, Ekaterinburg, 620108, Russian Federation

Доп.точки доступа:
Komogortsev, S. V.; Комогорцев, Сергей Викторович; Vazhenina, I. G.; Важенина, Ирина Георгиевна; Kleshnina, S. A.; Клешнина, Софья Андреевна; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Lepalovskij, V. N.; Pasynkova, A. A.; Svalov, A. V.
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Antiferromagnetic Resonance and Dielectric Properties of Rare-earth Ferroborates in the Submillimeter Frequency Range / A. M. Kuz'menko [et al.] // J. Exp. Theor. Phys. - 2011. - Vol. 113, Is. 1. - P. 113-120, DOI 10.1134/S106377611105013X. - Cited References: 27. - This work was supported by the Russian Foundation for Basic Research, project no. 10-02-00846. . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
GDFE3(BO3)(4)
SPECTROSCOPY
CRYSTAL
Кл.слова (ненормированные):
Antiferromagnetic resonance -- Basic parameters -- Effective anisotropy constant -- Ferroborates -- Ferroics -- Ferromagnetic orderings -- Frequency ranges -- Magnetic interactions -- Magnetoresonance -- Millimeter frequency range -- Rare earth ions -- Submillimeters -- Antiferromagnetic materials -- Crystallography -- Erbium -- Europium -- Ferromagnetic resonance -- Ion exchange -- Magnetic anisotropy -- Magnetic devices -- Magnetic structure -- Permittivity -- Resonance -- Antiferromagnetism
Аннотация: The magnetoresonance and dielectric properties of a number of crystals of a new family of multiferroics, namely, rare-earth ferroborates RFe(3)(BO(3))(4) (R = Y, Eu, Pr, Tb, Tb(0.25)Er(0.75)), are studied in the submillimeter frequency range (nu = 3-20 cm(-1)). Ferroborates with R = Y, Tb, and Eu exhibit permittivity jumps at temperatures of 375, 198, and 58 K, respectively, which are caused by the R32 -> P3(1)2(1) phase transition. Antiferromagnetic resonance (AFMR) modes in the subsystem of Fe(3+) ions are detected in the range of antiferromagnetic ordering (T < T(N) = 30-40 K) in all ferroborates that have either an easy-plane (Y, Eu) or easy-axis (Pr, Tb, Tb(0.25)Er(0.75)) magnetic structure. The AFMR frequencies are found to depend strongly on the magnetic anisotropy of a rare-earth ion and its exchange interaction with the Fe subsystem, which determine the type of magnetic structure and the sign and magnitude of an effective anisotropy constant. The basic parameters of the magnetic interactions in these ferroborates are found, and the magnetoelectric contribution to AFMR is analyzed.

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Держатели документа:
[Kuz'menko, A. M.
Mukhin, A. A.
Ivanov, V. Yu.
Lebedev, S. P.] Russian Acad Sci, Inst Gen Phys, Moscow 119991, Russia
[Kadomtseva, A. M.] Moscow MV Lomonosov State Univ, Moscow 119991, Russia
[Bezmaternykh, L. N.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Institute of General Physics, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russian Federation
Moscow State University, Moscow, 119991, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Kuz'menko, A. M.; Mukhin, A. A.; Ivanov, V. Y.; Kadomtseva, A. M.; Lebedev, S. P.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич
}
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Belyaev, B. A.
Competing magnetic anisotropies in obliquely deposited thin permalloy film / B. A. Belyaev, A. V. Izotov, P. N. Solovev // Physica B. - 2016. - Vol. 481. - P. 86-90, DOI 10.1016/j.physb.2015.10.036. - Cited References: 31. - This study was supported by the Ministry of Education and Science of the Russian Federation, task no. 3.528.2014K . - ISSN 0921-4526

РУБ Physics, Condensed Matter
Рубрики:
FERROMAGNETIC-RESONANCE
MICROMAGNETIC CALCULATION
Кл.слова (ненормированные):
Thin film -- Magnetic anisotropy -- Oblique deposition -- Ferromagnetic resonance -- Micromagnetic simulation
Аннотация: Distribution of the magnetic anisotropy in thin film prepared by thermal vacuum oblique deposition of permalloy with small off-normal angle of incident in the presence of an external magnetic field has been studied by ferromagnetic resonance technique. On local area of the sample, a mutual compensation of near orthogonal in-plane uniaxial magnetic anisotropies induced by oblique deposition and by applied magnetic field has been found. Moreover, in addition to the uniaxial (twofold) magnetic anisotropy, fourfold and sixfold magnetic anisotropies have been observed in the sample. To explain the obtained high-order anisotropies, we assumed that the sample has exchange coupled adjacent regions or phases with different parameters of magnetic anisotropy. The results of the micromagnetic analysis of a two-layer model of the sample confirm the hypothesis. © 2015 Elsevier B.V. All rights reserved.

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Держатели документа:
Siberian Federal University, 79, pr. Svobodnyi, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, 50/38, Akademgorodok, Krasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace University, 31, pr. Imeni Gazety Krasnoyarskii Rabochii, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Izotov, A. V.; Изотов, Андрей Викторович; Solovev, P. N.; Беляев, Борис Афанасьевич
}
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Collective Spin Glass State in Nanoscale Particles of Ferrihydrite / S. V. Stolyar, R. N. Yaroslavtsev, V. P. Ladygina [et al.] // Semiconductors. - 2020. - Vol. 54, Is. 12. - P. 1710-1712DOI 10.1134/S1063782620120362. - Cited References: 16. - This work was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory, the Krasnoyarsk Regional Fund for the Support of Scientific and Technical Activities (project no. 19-42-240012 r_a “Magnetic resonance in ferrihydrite nanoparticles: Effects associated with the “core–shell” structure). This work was supported by a grant from the President of the Russian Federation for state support of young Russian scientists – candidates of sciences no. MK-1263.2020.3
Кл.слова (ненормированные):
nanoparticles -- ferrihydrite -- magnetic anisotropy -- magnetic resonance
Аннотация: Ferromagnetic resonance was used to study three types of ferrihydrite nanoparticles: nanoparticles formed as a result of the cultivation of microorganisms Klebsiella oxytoca; chemically prepared ferrihydrite nanoparticles; chemically prepared ferrihydrite nanoparticles doped with Cu. It is established from the ferromagnetic resonance data that the frequency-field dependence (in the temperature range ТP ‹ T ‹ T*) is described by the expression: 2πν/γ ⁼ НR + HA(T = 0)(1 – T/Т*), where γ is the gyromagnetic ratio, HR is the resonance field. The induced anisotropy HA is due to the spin-glass state of the near-surface regions. TP temperature characterizes the energy of the interparticle interaction of nanoparticles.

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Держатели документа:
Kirensky Institute of Physics, SB Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk Scientific Center, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Stolyar, S. V.; Столяр, Сергей Викторович; Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Ladygina, V. P.; Balaev, D. A.; Балаев, Дмитрий Александрович; Pankrats, A. I.; Панкрац, Анатолий Иванович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; International Symposium “Nanostructures: Physics and Technology”(28th ; Sept 28 - Oct 2, 2020 ; Minsk, Republic of Belarus)
}
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    Comparative study of the magnetic phase diagrams and spin-flop-driven magnetodielectric responses of the pure and Mn3+-doped Pb2Fe2Ge2O9 single crystals / A. Pankrats, M. Kolkov, A. Balaev [et al.] // J. Magn. Magn. Mater. - 2021. - Vol. 534. - Ст. 168023, DOI 10.1016/j.jmmm.2021.168023. - Cited References: 21. - This study was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory, and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project no. 18-42-240008 “Effect of the Magnetic Structure on the Magnetodielectric Properties of Oxide Crystals Containing Stereoactive Pb 2+ and Bi 3+ Ions” . - ISSN 0304-8853
   Перевод заглавия: Сравнительное исследование магнитных фазовых диаграмм и индуцированных спин-флоп переходом магнитодиэлектрических откликов в чистом и допированном Mn3+ монокристаллах Pb2Fe2Ge2O9
Кл.слова (ненормированные):
Magnetic structure -- Magnetic anisotropy -- Magnetodielectric properties -- Spin reorientation -- Magnetic phase diagram
Аннотация: The Pb2Fe2-xMnxGe2O9 (x = 0.43) orthorhombic antiferromagnet single crystals have been synthesized by a modified pseudo-flux technique and their magnetic and magnetodielectric properties have been investigated. It has been established that partial substitution of highly anisotropic Mn3+ ions for iron ones significantly affects the magnetic structure of the crystal. Under magnetization of the crystal along the rhombic b and c axes, magnetization jumps have been detected, which are indicative of the occurrence of orientational transitions identified as first-order ones. No weak ferromagnetism characteristic of the pure crystal in the rhombic a axis direction has been detected. The field dependences of the magnetization for the pure and Mn-doped crystals have been analyzed using the thermodynamic potential that takes into account the crystal symmetry. It has been shown that, in the Mn-substituted crystal, the antiferromagnetic vector in the ground state is parallel to the rhombic b axis; in this state, weak ferromagnetism has not been observed. Under magnetization along the b axis, a conventional spin-flop transition occurs. The orientational transition under magnetization along the c axis has been attributed to the reorientation of the antiferromagnetic vector relative to the a axis with the simultaneous occurrence of a weak ferromagnetic moment along the c axis. Magnetic phase diagrams of the Mn-doped crystal for the magnetic fields H||b and H||c have been built. In the Mn-doped crystal, at E||c and H||c, the orientational transition-induced magnetodielectric response jump has been detected, which is higher than the jumps observed for the undoped crystal by a factor of 3. The magnetodielectric properties of the pure and Mn-doped crystals have been analyzed using their magnetic phase diagrams.

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Pankrats, A. I.; Панкрац, Анатолий Иванович; Kolkov, M. I.; Колков, Максим Игоревич; Balaev, A. D.; Балаев, Александр Дмитриевич; Freydman, A. L.; Фрейдман, Александр Леонидович; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Balaev, D. A.; Балаев, Дмитрий Александрович
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    Conversion of magnetic anisotropy in electrodeposited Co-Ni alloy nanowires / A. S. Samardak [et al.] // J. Magn. Magn. Mater. - 2015. - Vol. 383. - P. 94-99, DOI 10.1010/j.jmmm.2014.10.047. - Cited References:24. - This work was supported in part by the Russian Ministry of Education and Science and Far Eastern Federal University. M.N acknowledges the student financial support of Iranian Nanotechnology Initiative Council. . - ISSN 0304. - ISSN 1873-4766
   Перевод заглавия: Конверсия магнитной анизотропии в электроосажденных нанонитях сплава CoNi

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
COBALT NANOWIRES
ARRAYS
Кл.слова (ненормированные):
Coercive force -- Magnetic anisotropy -- Magnetic hysteresis -- Binary alloy -- nanowires -- Alumina template -- Electrodeposition
Аннотация: In this paper, the influence of alternating current (ac) electrodeposition frequency and waveform is reported on chemical composition, microstructure and consequently magnetic properties of Co-Ni binary alloy nanowire arrays embedded in an alumina template. For sinusoidal and square electrodeposition waveforms the easy axis of magnetization rotates from being parallel to perpendicular orientation to nanowire long axis as the deposition frequency increases from 200 to 800 Hz. The reason for the drastic change of magnetic anisotropy in nanowires is attributed to the increase of cobalt content and the crystal structure phase transformation from fcc-hcp mixture at high Ni content to imp at high Co content. We explain the conversion of magnetic behavior of nanowire arrays in terms of a competition between the shape and magnetocrystalline anisotropies. (C) 2014 Elsevier B.V. All rights reserved.

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Держатели документа:
Far Eastern Fed Univ, Sch Nat Sci, Vladivostok, Russia.
Sahand Univ Technol, Fac Mat Engn, Tabriz, Iran.
SB Russian Acad Sci, Inst Phys, Krasnoyarsk, Russia.

Доп.точки доступа:
Samardak, A. S.; Nasirpouri, F.; Nadi, M.; Sukovatitsina, E. V.; Ognev, A. V.; Chebotkevich, L. A.; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Russian Ministry of Education and Science; Far Eastern Federal University; Iranian Nanotechnology Initiative Council
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CoPt-Al2O3 nanocomposite films: synthesis, structure, and magnetic properties / V. S. Zhigalov, L. E. Bykova, V. G. Myagkov [et al.] // J. Surf. Ingestig. - 2020. - Vol. 14, Is. 1. - P. 47-53, DOI 10.1134/S102745102001022X. - Cited References: 29. - This study was supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research projects no. 18-42-243009 r_mol_a and no. 19-43-240003 r_a, and the Foundation for Assistance to Small Innovative Enterprises in Science and Technology, contract no. 11843GU/2017, code 0033636, U.M.N.I.K. competition. . - ISSN 1027-4510. - ISSN 1819-7094

РУБ Physics, Condensed Matter
Рубрики:
SOLID-STATE SYNTHESIS
   GRANULAR THIN-FILMS
   THERMITE SYNTHESIS
   PHASE
Кл.слова (ненормированные):
thin films -- ferromagnetic nanocomposites -- CoPt alloy -- magnetic anisotropy
Аннотация: The structure and magnetic properties of CoPt–Al2O3 nanocomposite films synthesized by the annealing of Al/(Co3O4 + Pt) bilayers on a MgO(001) substrate at 650°C in vacuum are investigated. The synthesized composite films contain ferromagnetic CoPt grains with an average size of 25–45 nm enclosed in a nonconducting Al2O3 matrix. The saturation magnetization (Ms ~ 330 G) and coercivity (Hc ≈ 6 kOe) of the films are measured in the film plane and perpendicular to it. The obtained films are characterized by a spatial rotational magnetic anisotropy, which makes it possible to arbitrarily set the easy magnetization axis in the film plane or perpendicular to it using a magnetic field stronger than the coercivity (H ˃ Hc).

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Публикация на русском языке Нанокомпозитные пленки CoPt–Al2O3: синтез, структурные и магнитные свойства [Текст] / В. С. Жигалов, Л. Е. Быкова, В. Г. Мягков [и др.] // Поверхность. - 2020. - № 1. - С. 60-67

Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian State Univ Sci & Technol, Krasnoyarsk 660014, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Zhigalov, V. S.; Жигалов, Виктор Степанович; Bykova, L. E.; Быкова, Людмила Евгеньевна; Myagkov, V. G.; Мягков, Виктор Григорьевич; Pavlova, A. N.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Matsynin, A. A.; Мацынин, Алексей Александрович; Patrin, G. S.; Патрин, Геннадий Семёнович; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science [18-42-243009 r_mol_a, 19-43-240003 r_a]; Foundation for Assistance to Small Innovative Enterprises in Science and Technology [11843GU/2017, 0033636]
}
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Determination of magnetic anisotropies and miscut angles in epitaxial thin films on vicinal (111) substrate by the ferromagnetic resonance / B. A. Belyaev [et al.] // J. Magn. Magn. Mater. - 2017. - Vol. 440: EURO-Asian Symposium on Trends in Magnetism (EASTMAG) (AUG 15-19, 2016, Siberian Fed Univ, Krasnoyarsk, RUSSIA). - P. 181-184, DOI 10.1016/j.jmmm.2016.12.081. - Cited References:16. - This work was supported by the Ministry of Education and Science of the Russian Federation, Task no. 3.528.2014K. . - ISSN 0304-8853. - ISSN 1873-4766

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
SURFACE
SPECTROMETER
SPINTRONICS
Кл.слова (ненормированные):
Thin film -- Ferromagnetic resonance -- Magnetic anisotropy -- Vicinal (111) -- surface -- Iron silicide
Аннотация: A method for determining magnetic anisotropy parameters of a thin single-crystal film on vicinal (111) substrate as well as substrate miscut angles from angular dependence of ferromagnetic resonance field has been proposed. The method is based on the following: (i) a new approach for the solution of the system of nonlinear equations for equilibrium and resonance conditions; (ii) a new expression of the objective function for the fitting problem. The study of the iron silicide films grown on vicinal Si(111) substrates with different miscut angles confirmed the efficiency of the method. The proposed method can be easily generalized to determine parameters of single-crystal films grown on substrates with an arbitrary cut.

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Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Izotov, A. V.; Изотов, Андрей Викторович; Solovev, P. N.; Соловьев, Платон Николаевич; Yakovlev, I. A.; Ministry of Education and Science of the Russian Federation [3.528.2014K]; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН
}
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Effect of mechanical stress on structure of magnetization of three-layer nanosized disks / V. A. Orlov, V. S. Prokopenko, R. Y. Rudenko, I. N. Orlova // Phys. Met. Metallogr. - 2020. - Vol. 121, Is. 11. - P. 1039-1044, DOI 10.1134/S0031918X20100075. - Cited References: 38. - The research was funded by the Russian Foundation for Basic Research (RFBR), i.e., theoretical and numerical calculations by project No. 18-02-00161 and experimental study by project no. 20-02-00696 . - ISSN 0031-918X
Кл.слова (ненормированные):
nanolancet -- nanodisk -- magnetoelastic effect -- magnetic anisotropy
Аннотация: The contribution of magnetoelastic effects to the effective magnetic anisotropy of a three-layer film nanodisk (nonmagnetic metal/ferromagnet/nonmagnetic metal) was studied. The mechanical stresses at the lateral surface of the disk that are caused by two factors, i.e., unequal thermal expansion of layers and excess surface energy at the layers interfaces, were estimated. The case in which the contribution of magnetoelastic effects to the anisotropy is comparable with those of shape and crystalline anisotropies was discussed. It was shown that the main reason for the change in the local anisotropy field in the vicinity of a nanodisk edge was the mechanical stresses induced by the excess surface energy. The possible application of film nanodisks of nickel with a bilateral golden coating as “nanolancets” for noninvasive cell surgery of tumors was discussed.

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Публикация на русском языке Влияние механических напряжений на структуру намагниченности трехслойных наноразмерных дисков [Текст] / В. А. Орлов, В. С. Прокопенко, Р. Ю. Руденко, И. Н. Орлова // Физ. металлов и металловед. - 2020. - Т. 121 № 11. - С. 1135-1141

Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Astafiev Krasnoyarsk State Pedagogical University, Krasnoyarsk, 660049, Russian Federation

Доп.точки доступа:
Orlov, V. A.; Орлов, Виталий Александрович; Prokopenko, V. S.; Rudenko, R. Y.; Orlova, I. N.
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10.

Erkaev, N. V.
Solution for jump conditions at fast shocks in an anisotropic magnetized plasma / N. V. Erkaev, D. F. Vogl, H. K. Biernat // J. Plasma Phys. - 2000. - Vol. 64. - P. 561-578, DOI 10.1017/S002237780000893X. - Cited References: 10 . - ISSN 0022-3778

РУБ Physics, Fluids & Plasmas
Рубрики:
MAGNETOSHEATH
Кл.слова (ненормированные):
Magnetic anisotropy -- Magnetic field effects -- Magnetohydrodynamics -- Plasma sheaths -- Plasma shock waves -- Plasma stability -- Pressure effects -- Thermal effects -- Alfven Mach number -- Anisotropic magnetized plasma -- Jump condition -- Magnetoplasma
Аннотация: We study the magnetic field and plasma parameters downstream of a fast shock as functions of normalized upstream parameters and the rate of pressure anisotropy (defined as the ratio of perpendicular to parallel pressure). We analyse two cases: with the shock (i) perpendicular and (ii) inclined with respect to the magnetic field. The relations on the fast, shock in a magnetized anisotropic plasma are solved taking into account the criteria for the mirror instability and firehose instability bounding the pressure anisotropy downstream of the shock. Our analysis shows that the parallel pressure and the parallel temperature as well as the tangential component of the velocity are the parameters that are most sensitive to the rate of pressure anisotropy. The variations of the other parameters, namely density, normal velocity, tangential component of the magnetic field, perpendicular pressure, and perpendicular temperature are much less pronounced, in particular when the perpendicular pressure exceeds the parallel pressure. The variations of all parameters increase substantially for a very low rate of anisotropy, which is bounded by the firehose instability in the case of inclined shocks. Using the criterion for mirror instability as a closure relation for the jump conditions at the fast shock, we obtain the plasma parameters and the magnetic field downstream of the shock as functions of the Alfven Mach number. For each Alfven Mach number, the criterion for mirror instability determines the minimum jumps in such parameters as density, tangential magnetic field component, parallel pressure, and temperature. and determines the maximum values of the velocity components and the perpendicular temperature. Ideal anisotropic magnetohydrodynamics (MHD) has wide applications for space plasma physics. Observations of the field and plasma behaviour in the solar wind as well as in the Earth's magnetosheath have highlighted the need for an MHD model where the plasma pressure is treated as a tensor.

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Держатели документа:
Russian Acad Sci, Inst Computat Modelling, Krasnoyarsk 660036, Russia
Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria
Graz Univ, Inst Geophys, A-8010 Graz, Austria
Graz Univ, Inst Theoret Phys, A-8010 Graz, Austria
ИВМ СО РАН
Institute of Computational Modelling, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Space Research Institute, Austrian Academy of Sciences, Schmiedlstra?e 6, A-8042 Graz, Austria
Institute for Geophysics, Astrophysics, and Meteorology, University of Graz, Universitatsplatz 5, 8010 Graz, Austria
Institute for Theoretical Physics, University of Graz, Universitatsplatz 5, 8010 Graz, Austria

Доп.точки доступа:
Vogl, D. F.; Biernat, H. K.; Еркаев, Николай Васильевич
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