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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Boev N. M., Izotov A. V., Skomorokhov G. V., Solovev P. N.
Заглавие : Magnetic properties of permalloy thin film edges
Коллективы : Ministry of Science and Higher Education of the Russian Federation [02, G25.31.0313]
Место публикации : Russ. Phys. J. - 2020. - Vol. 63, Is. 1. - P.16-22. - ISSN 1064-8887, DOI 10.1007/s11182-020-01997-6. - ISSN 1573-9228(eISSN)
Примечания : Cited References: 23. - This work was supported by the Ministry of Science and Higher Education of the Russian Federation (Project No. 02.G25.31.0313).
Предметные рубрики: ANISOTROPIES
Аннотация: The paper presents the results of ferromagnetic resonance (FMR) spectrometry of magnetic properties of nanocrystalline thin films obtained by magnetron sputtering of permalloy targets of various composition (NixFe1-x, x = 0.6-0.85). The behavior of the main magnetic properties of the thin film edges is analyzed. Near the film edges, not only the fluctuation of the uniaxial magnetic anisotropy field is observed, but also a drastic widening of the FMR line and the decrease in the effective saturation magnetization.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stolyar S. V., Yaroslavtsev R. N., Chekanova L. A., Rautskii M. V., Bayukov O. A., Cheremiskina E. V., Nemtsev I. V., Volochaev M. N., Iskhakov R. S.
Заглавие : Ferromagnetic resonance in iron tubes deposited on a copper grid
Место публикации : J. Magn. Magn. Mater. - 2020. - Vol. 511. - Ст.166979. - ISSN 03048853 (ISSN), DOI 10.1016/j.jmmm.2020.166979
Примечания : Cited References: 22. - This work was supported by Russian Foundation for Basic Research , Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project No. 18-42-240006. We are grateful to the Center of collective use of FRC KSC SB RAS for the provided equipment
Аннотация: In the work, a composite material, which is an iron coating on a copper microgrid with a mesh size of 50 μm, is investigated. Iron coatings were synthesized by electroless deposition using arabinogalactan as a reducing agent. Samples were investigated using transmission electron microscopy, Mossbauer spectroscopy and ferromagnetic resonance methods. Magnetic anisotropy in the grid plane was studied by measuring the FMR spectra. The results of the study are discussed by modeling the composite as a wireframe system of magnetic tubes.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Moseenkov S. I., Kuznetsov V. L., Zavorin A. V., Golubtsov G. V., Korovin, E. Yu., Suslyaev V. I., Ishchenko A. V., Serkova A. N., Sergeenko D. I., Velikanov D. A.
Заглавие : Electrophysical properties of composites based on polyethylene modified with multi-walled carbon nanotubes with high content of Fe-Co-catalyst
Коллективы : Russian Science FoundationRussian Science Foundation (RSF) [17-73-20293]
Место публикации : Russ. J. Appl. Chem. - 2020. - Vol. 93, Is. 4. - P.586-594. - ISSN 1070-4272, DOI 10.1134/S107042722004014X. - ISSN 1608-3296(eISSN)
Примечания : Cited References: 30. - This work was financially supported by the Russian Science Foundation, project no. 17-73-20293.
Предметные рубрики: POLYMER COMPOSITES
NANOPARTICLES
ACTIVATION
NANOCOMPOSITES
Аннотация: The effect of the residual catalyst for the synthesis of multi-walled carbon nanotubes (MWCNTs) on the electrophysical properties of MWCNT-polyethylene composites produced by melt mechanical mixing was studied. The residual catalyst content was varied by changing the MWCNTs synthesis time. The nanotubes used in the work were characterized using transmission and scanning electron microscopy, atomic emission analysis, X-ray phase analysis, and magnetic permeability measurements. The structure of the synthesized composites was studied using optical and scanning electron microscopy. The dependences of the specific magnetization on the applied magnetic field, bulk electrical conductivity on the volumetric content of the filler in the composite, and the frequency dependences of the reflection, transmission, and absorption of electromagnetic radiation in the range 0.01-18 GHz were obtained. It was established that the obtained composites are characterized by a uniform distribution of nanotubes in the polymer matrix, and the dependence of the bulk electrical conductivity on the content of MWCNTs in the composite has a percolation character. Variation in the synthesis time of nanotubes allows producing MWCNTs with a high content of ferromagnetic particles, which are an alloy close in stoichiometry to the composition of the active component of the catalyst. It was shown that the use of composites modified with MWCNTs with a high content of residual catalyst is more effective for absorbing electromagnetic radiation due to an increase in their magnetic losses.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zhigalov V. S., Bykova L. E., Myagkov V. G., Pavlova A. N., Volochaev M. N., Matsynin A. A., Patrin G. S.
Заглавие : CoPt-Al2O3 nanocomposite films: synthesis, structure, and magnetic properties
Коллективы : 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]
Место публикации : J. Surf. Ingestig. - 2020. - Vol. 14, Is. 1. - P.47-53. - ISSN 1027-4510, DOI 10.1134/S102745102001022X. - ISSN 1819-7094(eISSN)
Примечания : 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.
Предметные рубрики: SOLID-STATE SYNTHESIS
GRANULAR THIN-FILMS
THERMITE SYNTHESIS
PHASE
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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stolyar S. V., Balaev D. A., Ladygina V. P., Pankrats A. I., Yaroslavtsev R. N., Velikanov D. A., Iskhakov R. S.
Заглавие : Ferromagnetic resonance study of biogenic ferrihydrite nanoparticles: spin-glass state of surface spins
Место публикации : JETP Letters. - 2020. - Vol. 111, Is. 3. - P.183-187. - ISSN 0021-3640, DOI 10.1134/S0021364020030145. - ISSN 1090-6487(eISSN)
Примечания : Cited References: 41. - This work was supported by the Russian Foundation for Basic Research, project no. 18-02-40137.This work was supported by the Russian Foundation for Basic Research, by the Government of Krasnoyarsk krai, by 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”), and by the Council of the President of the Russian Federation for State Support of Young Scientists and Leading Scientific Schools (project no. MK-1263.2020.3).
Предметные рубрики: MAGNETIC-PROPERTIES
NIO NANOPARTICLES
TRANSITION
ANISOTROPY
Аннотация: Ferrihydrite nanoparticles (2–3 nm in size), which are products of the vital activity of microorganisms, are studied by the ferromagnetic resonance method. The “core” of ferrihydrite particles is ordered antiferromagnetically, and the presence of defects leads to the appearance of an uncompensated magnetic moment in nanoparticles and the characteristic superparamagnetic behavior. It is established from the ferromagnetic resonance data that the field dependence of the frequency is described by the expression 2πν/γ = HR + H A(T=0) (1 − T/T*), where γ is the gyromagnetic ratio, HR is the resonance field, HA ≈ 7 kOe, and T* ≈ 50 K. The induced anisotropy HA is due to the spin-glass state of the near-surface regions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ustinov V. V., Rinkevich A. B., Vazhenina I. G., Milyaev M. A.
Заглавие : Microwave giant magnetoresistance and ferromagnetic and spin-wave resonances in (CoFe)/Cu nanostructures
Коллективы : Russian Science FoundationRussian Science Foundation (RSF) [AAAA-A18-118020290104-2, AAAA-A19-119012990095-0]; [17-1201002]
Место публикации : J. Exp. Theor. Phys. - 2020. - Vol. 131, Is. 1. - P.139-148. - ISSN 1063-7761, DOI 10.1134/S1063776120070171. - ISSN 1090-6509(eISSN)
Примечания : Cited References: 51. - This work was performed in terms of project Spin no. AAAA-A18-118020290104-2 and project Function no. AAAA-A19-119012990095-0. Section 3 was supported by the Russian Science Foundation, project no. 17-1201002
Предметные рубрики: COFE/CU SUPERLATTICES
MAGNETIC MULTILAYERS
CO/CU MULTILAYERS
FILMS
Аннотация: The microwave phenomena that occur in magnetic multilayer (CoFe)/Cu nanostructures, which have a giant magnetoresistance, are studied. The transmission of waves through a nanostructure is used to investigate the microwave giant magnetoresistance effect. The changes in the transmission coefficient at frequencies of 29–38 GHz are found to exceed the relative magnetoresistance, which distinguishes the system under study from the nanostructures studied earlier. Ferromagnetic and spin-wave resonances are used to study the angular dependences of the microwave absorption spectra of a multilayer (CoFe/Cu)n nanostructure. The following parameters are determined: the critical angle that determines the boundaries of the ranges of excitation of uniform and nonuniform spin modes, the type of boundary conditions describing the pinning of spins on the outer nanostructure surfaces, and the surface anisotropy and exchange interaction constants.
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Burmitskikh A. V., Belyaev B. A., Boev N. M., Kleshnina S. A.
Заглавие : Measuring the imaginary part of the complex magnetic permeability of thin films using resonant and non-resonant automated measuring systems
Коллективы : Ural Symposium on Biomedical Engineering, Radioelectronics and Information Technology
Место публикации : 2020 Ural Symposium on Biomedical Engineering, Radioelectronics and Information Technology (14-15 May 2020 ; Yekaterinburg, Russia). Proceedings - 2020 Ural Symposium on Biomedical Engineering, Radioelectronics and Information Technology, USBEREIT 2020: Institute of Electrical and Electronics Engineers, 2020. - Ст.9117770. - P.265-268. - , DOI 10.1109/USBEREIT48449.2020.9117770
Примечания : Cited References: 14. - The reported study was funded by RFBR, project number 19-32-90066\19
Аннотация: This paper considers resonant and non-resonant methods for measuring magnetic characteristics of Ni 80 Fe 20 thin films with 1000 Å thickness. The imaginary part of complex magnetic permeability was measured by using resonant and nonresonant measuring cells. The resonant measuring cell included: a micro-strip line, a lumped capacitance, and an amplitude detector. The non-resonant measuring cell included a short-circuited micro-strip line. The studied sample of thin magnetic film is placed under the short-circuited micro-strip line. The self-resonant frequency of the non-resonant measuring cell is higher than frequency of the ferromagnetic resonance (in field, equal 14 Oersteds). Ferromagnetic resonance method was used to study the change of measuring cell resonant frequency. The angular dependences of resonant frequency were achieved by the change of angle between constant magnetic field and high-frequency field of excitation, the hard axis of magnetization in thin magnetic film. The measurements were carried out using automation units. A numerical comparison of the obtained results showed that the difference between measurements does not exceed 5%.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bykova L. E., Myagkov V. G., Zhigalov V. S., Matsynin A. A., Velikanov D. A., Bondarenko G. N., Patrin G. S.
Заглавие : Magnetic and structure properties of CoPt-In2O3 nanocomposite films
Коллективы : Russian Foundation for Basic Research, Government of Krasnoyarsk Territory [19-43-240003]
Место публикации : J. Sib. Fed. Univ. Math. Phys. - 2020. - Vol. 13, Is. 4. - P.431-438. - ISSN 1997-1397, DOI 10.17516/1997-1397-2020-13-4-431-438; Журн. СФУ. Матем. и физика. - ISSN 2313-6022(eISSN)
Примечания : 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. 19-43-240003
Предметные рубрики: THIN-FILMS
TEMPERATURE
PHASE
Аннотация: The structural and magnetic properties of CoPt-In2O3 nanocomposite films formed by vacuum annealing of the In/(Co3O4 + Pt)/MgO film system in the temperature range of 100–800 °C have been investigated. The synthesized nanocomposite films contain ferromagnetic CoPt grains with an average size of 5nm enclosed in an In2O3 matrix, and have a magnetization of 600 emu/cm3, and a coercivity of 150 Oe at room temperature. The initiation 200 °C and finishing 800 °C temperatures of synthesis were determined, as well as the change in the phase composition of the In/(Co3O4 + Pt)/MgO film during vacuum annealing.Исследованы структурные и магнитные свойства нанокомпозитных пленок CoPt- In2O3, полученных вакуумным отжигом пленочной системы In/(Co3O4 + Pt)/MgO в интервале температур 100 – 800 °C. Синтезированные нанокомпозитные пленки содержали ферромагнитные CoPt-кластеры со средним размером 5 nm, заключенные в матрицу In2O3, и имели намагниченность 600 emu/cm3, коэрцитивную силу 150 Oe при комнатной температуре. Определены температуры начала 200 °C и окончания 800 °C синтеза, а также изменение фазового состава пленки In/(Co3O4 + Pt)/MgO при вакуумном отжиге.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sasmaz M., Dreist F., Iglesias I., Cakir A., Farle M., Acet M.
Заглавие : Decomposition in Ni-Co-Mn-In functional Hensler alloys and its effect on shell-ferromagnetic and magnetocaloric effects
Коллективы : Deutsche ForschungsgemeinschaftGerman Research Foundation (DFG) [405553726-CRC/TRR 270]; Turkish Scientific and Technological Research CouncilTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [1059B191701241]; Deutsche Akademisches Austausch Dienst; Government of the Russian Federation [075-15-2019-1886]
Место публикации : Phys. Rev. B. - 2020. - Vol. 102, Is. 6. - Ст.064401. - ISSN 2469-9950, DOI 10.1103/PhysRevB.102.064401. - ISSN 2469-9969(eISSN)
Примечания : Cited References: 38. - This work was supported by Deutsche Forschungsgemeinschaft (Project No. 405553726-CRC/TRR 270). The authors acknowledge support from the Turkish Scientific and Technological Research Council (Project No. 1059B191701241), the Deutsche Akademisches Austausch Dienst, and the Government of the Russian Federation (Grant No. 075-15-2019-1886).
Предметные рубрики: FIELD-INDUCED STRAIN
MAGNETIC-FIELD
MARTENSITIC-TRANSFORMATION
Аннотация: Ni-Co-Mn-In Heusler-based compounds are interesting for their magnetocaloric properties and have been widely investigated for this purpose. For Co compositions more than 5 at% in (Ni100-xCox)50Mn25+yIn25-y the material is no longer single phase, and for y 25, shell-ferromagnetic precipitation occurs. Our study is twofold: First we study here the shell-ferromagnetic properties of these systems and show that their ferromagnetic exchange can be strengthened by introducing Co into the precipitate. Second, we further show that both the multiphase character and shell-ferromagnetic precipitation have strong implications on the magnetocaloric properties.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bhagat, Babli, Semisalova, Anna, Meckenstock, Ralf, Farle M.
Заглавие : Reversal of uniaxial magnetic anisotropy in Fe/GaAs (110) films driven by surface relaxation: An in situ ferromagnetic resonance study
Коллективы : Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)German Research Foundation (DFG) [RO 5030/2-1, 405553726-TRR 270]; Government of the Russian Federation [075-15-2019-1886]
Место публикации : AIP Adv. - 2020. - Vol. 10, Is. 7. - Ст.075219. - ISSN 2158-3226(eISSN), DOI 10.1063/5.0004261
Примечания : Cited References: 32. - This work was supported by Deutsche Forschungsgemeinschaft (DFG, German Research Foundation): Project Nos. RO 5030/2-1 and 405553726-TRR 270, and by the Government of the Russian Federation (Research Grant No. 075-15-2019-1886). The authors acknowledge Florian Romer for initial funding and training and are thankful to Benjamin Zingsem for helping in data fitting and to Ulf Wiedwald for AFM measurements.
Предметные рубрики: EPITAXIAL FE FILMS
GAAS(001)
GAAS
RECONSTRUCTION
LAYERS
Аннотация: We report an in situ study of the time evolution of magnetic anisotropy constants of an uncapped 4 nm [~ 27 monolayers (ML)] Fe film epitaxially grown on a GaAs (110) substrate at room temperature under ultra-high vacuum (UHV) conditions. The structural and chemical properties are monitored by low energy electron diffraction and Auger spectroscopy with a sensitivity of 0.01 ML. The in situ UHV ferromagnetic resonance (FMR) study over a period of 6 days in 10-9 Pa reveals that there is a slow magneto-morphological transition of the Fe film surface at room temperature. The resonance field measured in situ in the [110] direction initially changes at a rate of 0.3 mT/h within 30 h after deposition and later at 0.1 mT/h over 80 h. We determine the time-dependent changes in the in-plane and out-of-plane anisotropy constants and find a sign change in the uniaxial in-plane anisotropy in the first 24 h due to morphological changes at the surface. The in situ FMR measurements and the Auger analysis allow us to exclude changes in the magnetization and anisotropy due to the contamination and oxidation of the Fe film.
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11.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Fel'k V. A., Komogortsev S. V.
Заглавие : Ferromagnetic resonance in micro and nanotubes
Коллективы : Российская академия наук, Уральское отделение РАН, Институт физики металлов им. М. Н. Михеева Уральского отделения РАН, Уральский федеральный университет им. первого Президента России Б.Н. Ельцина, Российский фонд фундаментальных исследований, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : Euro-asian symposium "Trends in magnetism" (EASTMAG-2019): Book of abstracts/ чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 1. - Ст.B.P17. - P.189-190. - ISBN 978-5-9500855-7-4 (Шифр В33/E12-125657784)
Примечания : Cited References: 1. - The study was carried out with the financial support of the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Region, the Krasnoyarsk Regional Science Foundation as part of the research project No. 18-42-240006 ”Nanomaterials with magnetic properties determined by topological features of the nanostructure”
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12.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Komogortsev S. V., Denisova E. A., Chekanova L. A., Neznakhin D. S., Nemtsev I. V., Fel'k V. A., Iskhakov R. S.
Заглавие : Magnetization curves of ferromagnetic microtubes
Коллективы : Российская академия наук, Уральское отделение РАН, Институт физики металлов им. М. Н. Михеева Уральского отделения РАН, Уральский федеральный университет им. первого Президента России Б.Н. Ельцина, Российский фонд фундаментальных исследований, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : Euro-asian symposium "Trends in magnetism" (EASTMAG-2019): Book of abstracts/ чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 1. - Ст.C.P18. - P.301. - ISBN 978-5-9500855-7-4 (Шифр В33/E12-125657784)
Примечания : Cited References: 2. - Support by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project № 18-42-240006 is acknowledged.
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13.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Vazhenina I. G., Iskhakov R. S., Rautskii M. V., Milyaev M. A., Naumova L. I., Klepikova A. S.
Заглавие : Angular dependences of uniform and non-uniform ferromagnetic resonance in multilayer films
Коллективы : Российская академия наук, Уральское отделение РАН, Институт физики металлов им. М. Н. Михеева Уральского отделения РАН, Уральский федеральный университет им. первого Президента России Б.Н. Ельцина, Российский фонд фундаментальных исследований, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : Euro-asian symposium "Trends in magnetism" (EASTMAG-2019): Book of abstracts/ чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 1. - Ст.B.P19. - P.193. - ISBN 978-5-9500855-7-4 (Шифр В33/E12-125657784)
Примечания : Cited References: 2. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project No 18-42-243005 ”Synthesis and investigation of magnetic properties of gradient materials that are characterized by predetermine type of the magnetic parameter change”.
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14.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ovchinnikov S. G., Bartolome J., Sese J., Varnakov S. N., Komogortsev S. V., Kosyrev N. N., Parshin A. M., Aleksandrova G. A., Kuschenkov S. A., Dolbak A. E., Olshanetsky B. Z., Pchelyakov O. P.
Заглавие : Ferromagnetic|semicodactor Fe|Si nanostructures for spintronics
Коллективы : "Trends in Nanomechanics and Nanoengineering", workshop, Сибирский федеральный университет, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : Workshop "Trends in Nanomechanics and Nanoengineering": book of abstracts/ предс. сем. K. S. Aleksandrov ; зам. предс. сем.: G. S. Patrin, S. G. Ovchinnikov ; чл. лок. ком.: N. N. Kosyrev, A. S. Fedorov [et al]. - 2009. - P.12
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bykova L. E., Zharkov S. M., Myagkov V. G., Zhigalov V. S., Patrin G. S.
Заглавие : In situ electron diffraction investigation of solid state synthesis of Co-In2O3 ferromagnetic nanocomposite thin films
Место публикации : JOM. - 2020. - Vol. 72, Is. 6. - P.2139–2145. - ISSN 10474838 (ISSN), DOI 10.1007/s11837-019-03919-5
Примечания : Cited References: 52. - The investigation was conducted under the partial financial support of the Russian Foundation for Basic Research (Grants #18-03-01173 and #19-43-240003).
Аннотация: In situ electron diffraction was used to study structural transformations during the formation of Co-In2O3 ferromagnetic nanocomposite thin films in a thermite reaction of In/Co3O4 bilayer thin films. Heating was performed from room temperature to 600°C at a rate of 4°C/min, while simultaneously electron diffraction patterns were recorded at a speed of 4 frames/min. This made it possible to determine the initiation, 185°C, and finishing, 550°C, temperatures of the solid-state synthesis, as well as the change in the phase composition during the thermite reaction. The synthesized Co-In2O3 film nanocomposite contained ferromagnetic cobalt nanoclusters surrounded by an In2O3 layer, with an average size of 20 nm, and had a magnetization of 400 emu/cm3 and a coercivity of 50 Oe at room temperature. The estimate of the effective interdiffusion coefficient of the reaction suggests that the main mechanism for the formation of the Co-In2O3 nanocomposite is diffusion along the grain boundaries and dislocations.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vazhenina I. G., Iskhakov R. S., Rautskii M. V., Milyaev M. A., Naumova L. I.
Заглавие : Ferromagnetic and spin-wave resonance in the [CoFe/Cu]N superlattice thin (30-nm) film
Место публикации : Phys. Solid State. - 2020. - Vol. 62, Is. 1. - P.153-159. - ISSN 10637834 (ISSN), DOI 10.1134/S1063783420010357
Примечания : Cited References: 44. - This study was supported by the Russian Foundation for Basic Research, Government of the Krasnoyarsk Krai, and Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project no. 18-42-243005 “Synthesis and Study of the Magnetic Properties of Gradient Materials with Different Types of a Specified Magnetic Parameter” and project “Spin” no. AAAA-A18-118020290104-2
Аннотация: Angular dependences of the microwave absorption spectra of a (CoFe/Cu)N multilayer film have been studied by the ferromagnetic and spin-wave resonance techniques. The critical angle θc indicating the ranges of excitation of uniform and nonuniform spin modes, type of the boundary conditions, and surface anisotropy and exchange coupling constants have been established. It is shown that the accuracy of identification of individual modes in the spectra plays a key role in the analysis of the detected curves.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Komogortsev S. V., Krainova G. S., Il’in N. V., Plotnikov V. S., Chekanova L. A., Nemtsev I. V., Yurkin G. Yu., Iskhakov R. S., Yatmanov D. A.
Заглавие : Features of the ferromagnetic resonance of amorphous FeSiBNbCu ribbons with different compositions
Место публикации : Inorg. Mater.: Appl. Res. - 2020. - Vol. 11, Is. 1. - P.177-180. - ISSN 20751133 (ISSN), DOI 10.1134/S2075113320010219
Примечания : Cited References: 25
Аннотация: The resonance microwave absorption in amorphous FeSiBNbCu ribbons with different compositions obtained by rapid quenching from the melt has been investigated. It is shown that the effective magnetization calculated from the resonance field linearly decreases with increasing boron and copper impurity concentrations and the total number of nonmagnetic impurity atoms in the iron-based FeSiBNbCu ribbons.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pile S., Feggeler T., Schaffers T., Meckenstock R., Buchner M., Spoddig D., Zingsem B., Ney V., Farle M., Wende H., Ohldag H., Ney A., Ollefs K.
Заглавие : Non-standing spin-waves in confined micrometer-sized ferromagnetic structures under uniform excitation
Место публикации : Appl. Phys. Lett. - 2020. - Vol. 116, Is. 7. - Ст.072401. - ISSN 00036951 (ISSN), DOI 10.1063/1.5139881
Примечания : Cited References: 37. - The use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515. The authors would like to thank the Austrian Science Foundation (FWF), Project No. I-3050 as well as the German Research Foundation (DFG), Project No. OL513/1-1 for financial support. K.O., H.W., B.Z and M.F. acknowledge additional funding from Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Project-ID 405553726 – TRR 270 and B.Z and M.F. acknowledge additional funding from Research Grant No. 075-15-2019-1886 from the Government of the Russian Federation
Аннотация: A non-standing characteristic of directly imaged spin-waves in confined micrometer-sized ultrathin Permalloy (Ni80Fe20) structures is reported along with evidence of the possibility to alter the observed state by modifications to the sample geometry. Using micromagnetic simulations, the presence of the spin-wave modes excited in the Permalloy stripes along with the quasi-uniform modes was observed. The predicted spin-waves were imaged in direct space using time resolved scanning transmission X-ray microscopy, combined with a ferromagnetic resonance excitation scheme (STXM-FMR). STXM-FMR measurements revealed a non-standing characteristic of the spin-waves. Also, it was shown by micromagnetic simulations and confirmed using STXM-FMR results that the observed characteristic of the spin-waves can be influenced by the local magnetic fields in different sample geometries.
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19.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Komogortsev S. V., Eroshenko P. E., Fel’k V. A.
Заглавие : Peculiar magnetic anisotropy in square ferromagnetic nanodot
Коллективы : Российская академия наук, Уральское отделение РАН, Институт физики металлов им. М. Н. Михеева Уральского отделения РАН, Уральский федеральный университет им. первого Президента России Б.Н. Ельцина, Российский фонд фундаментальных исследований, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : Euro-asian symposium "Trends in magnetism" (EASTMAG-2019): Book of abstracts/ чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 2. - Ст.J.P32. - P.245. - ISBN 978-5-9500855-7-4 (Шифр В33/E12-125657784)
Примечания : Cited References: . - Support by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project No. 18-42-240006 is acknowledged
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Orlov Yu. S., Nikolaev S. V., Ovchinnikov S. G.
Заглавие : Magnetic properties and spin crossover in transition metal oxides with d5 Ions at high pressures
Место публикации : J. Exp. Theor. Phys. - 2019. - Vol. 129, Is. 6. - P.1062-1069. - ISSN 10637761 (ISSN), DOI 10.1134/S1063776119120185
Примечания : Cited References: 33. - This study was supported by the Russian Science Foundation (project no. 18-12-00022)
Аннотация: We analyze the influence of cooperative effects on the magnetic properties and spin crossover between the high-spin (HS) term S = 5/2 and low-spin (LS) term S = 1/2 in Mott–Hubbard dielectrics with 3d5 ions under high pressures. Two cooperation mechanisms (superexchange interaction and effective interaction via the elastic system) are considered. The sign of the exchange interaction changes because of the crossover from the antiferromagnetic in the HS state to the ferromagnetic in the LS state. In view of the large difference between the ionic radii of the HS and LS states, the systems with spin crossover acquire an additional strong coupling via the elastic system. Using the Hubbard operator representation and considering the electronic states of the two terms simultaneously, we obtain the effective Hamiltonian with allowance for the cooperative effects. The magnetic phase diagram and the spin crossover are investigated in the mean field approximation. It is shown that the inclusion of cooperative effects at low temperatures leads to a first-order phase transition between the antiferromagnetic HS state and the ferromagnetic LS state. At higher temperatures, more complicated sequences of phase transitions are possible upon an increase in pressure, including the HS paramagnet–HS antiferromagnet–LS paramagnet and HS antiferromagnet–LS paramagnet–LS ferromagnet transitions.
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