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Variation of magnetic anisotropy and temperature-dependent FORC probing of compositionally tuned Co-Ni alloy nanowires / A. S. Samardak [et al.] // J. Alloys Compd. - 2018. - Vol. 732. - P. 683-693, DOI 10.1016/j.jallcom.2017.10.258. - Cited References: 60. - This work was supported by the Russian Foundation for Basic Research (grant 16-02-01015 А), by the Russian Ministry of Education and Science under the state task (3.5178.2017/8.9), by Act 211 of the Government of the Russian Federation (contract № 02.A03.21.0011) and by the Brain Pool Program (172S-2-3-1928) through the Korean Federation of Science and Technology Societies (KOFST) funded by the Ministry of Science, ICT and Future Planning. Financial support from Iranian Nanotechnology Initiative council is also acknowledged. . - ISSN 0925-8388
Кл.слова (ненормированные):
Coercive force -- Magnetic anisotropy -- Magnetic hysteresis -- Binary alloy nanowires -- Alumina template -- Electrodeposition -- First order reversal curves -- Stochastic magnetic domain -- Random anisotropy model
Аннотация: The magnetic microstructure of Co-Ni binary alloy nanowires electrodeposited with controlled composition into nanoporous aluminum oxide templates can be represented as an ensemble of stochastic magnetic domains, whose size is determined by the magnetic correlation length. Using a method based on the approaching of magnetization to saturation, we defined the dimension of regions with magnetic orientation coherency as the stochastic domain size. Based on the experimental measurements of magnetization curves near saturation and first order reversal curves (FORC), we described a relationship between the macroscopic and microscopic parameters of the nanowires depending on the crystal structure observed by high-resolution transmission electron microscopy in terms of the random anisotropy model. The alloy composition strongly determines the crystal structure, in particular, the grain size and hcp/fcc phase distribution, and influences the effective magnetic anisotropy energy providing the direction of easy magnetization in the nanowire arrays. The characterization of Co-Ni arrays by FORC method at room and low temperatures revealed the transformation of magnetic behavior and certain contributions to the energy of the effective magnetic anisotropy.

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Держатели документа:
School of Natural Sciences, Far Eastern Federal University, Vladivostok, Russian Federation
Institute of Physics, SB Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Department of Physics, Alexandru Ioan Cuza University of Iasi, Iasi, Romania
Faculty of Materials Engineering, Sahand University of Technology, Tabriz, Iran
Center for Spin-Orbitronic Materials, Korea University, Seoul, South Korea
National Research South Ural State University, Chelyabinsk, Russian Federation

Доп.точки доступа:
Samardak, A. S.; Ognev, A. V.; Samardak, A. Y.; Stebliy, E. V.; Modin, E. B.; Chebotkevich, L. A.; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Stancu, A.; Panahi-Danaei, E.; Fardi-Ilkhichy, A.; Nasirpouri, F.
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Crystal texture-dependent magnetic and magnetotransport properties of half-metallic Fe3O4 films grown on oxidized Si substrates by reactive deposition / V. V. Balashev [et al.] // J. Alloys Compd. - 2020. - Vol. 815. - Ст. 152398, DOI 10.1016/j.jallcom.2019.152398. - Cited References: 58. - his work is supported in part by the Russian Ministry of Science and Higher Education under the state tasks ( 3.5178.2017/8.9 and 3.4956.2017 ), by Act 211 of the Government of the Russian Federation (contract No. 02.A03.21.0011 ) and by the Comprehensive Program of Basic Research of the Far Eastern Branch of the Russian Academy of Sciences “Far East” 2018–2020 № 18-3-022 ( 0226-18-0031 ). . - ISSN 0925-8388
Кл.слова (ненормированные):
Magnetite -- Crystal texture -- Reactive deposition -- Magnetoresistance -- Magnetic saturation -- FORC
Аннотация: Nanocrystalline magnetite (Fe3O4) films with various preferred crystallite orientations were grown on oxidized silicon surface by reactive iron deposition in an oxygen atmosphere. Depending on the partial pressure of oxygen (PO2), the evolution of the structural, magnetic, and magnetotransport properties of the grown films was investigated. We found that the growth of films containing only the Fe3O4 phase occurs in a certain PO2 range, and the magnetite crystallites may have (311) or (110) preferred orientation. It was revealed that films with (311) and (110) textures have a column structure. An increase in the PO2 leads to a structure transformation from (311) to (110) texture with larger crystallites. A film with (110) texture showed higher values of saturation magnetization, magnetoresistance and spin polarization. The analysis of approach to magnetic saturation revealed that the local magnetic anisotropy of crystallites in textured films is much higher than the anisotropy of bulk magnetite due to the large surface contribution. The FORC diagram method in combination with the approach to magnetic saturation proved the existence of the exchange coupling between large and small grains. Our results open the reliable route for crystal texture-depending manipulation of functional properties of thin magnetite films for advanced spintronic applications.

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Держатели документа:
School of Natural Sciences, Far Eastern Federal University, Vladivostok, Russian Federation
Institute of Automation and Control Processes, FEB RAS, Vladivostok, Russian Federation
Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation
National Research South Ural State University, Chelyabinsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Balashev, V. V.; Ermakov, K. S.; Samardak, A. Y.; Ognev, A. V.; Samardak, A. S.; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Volochaev, M. N.; Волочаев, Михаил Николаевич; Tarasov, A. S.; Тарасов, Антон Сергеевич; Korobtsov, V. V.
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Magnetic properties and FORC-based characterization of electrodeposited Co–W alloy nanowires / A. Yu. Samardak, E. Yoo, Y. S. Jeon [et al.] // The Fifth Asian School-Conference on Physics and Technology of Nanostructured Materials : Proceedings. - VLadivostok : Dalnauka Publishing, 2020. - Ст. IV.03.02o. - P. 102 . - ISBN 978-5-8044-1698-1

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Доп.точки доступа:
Samardak, A. Yu.; Yoo, E.; Jeon, Y. S.; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Ognev, A.V.; Samardak, A. S.; Kim, Y. K.; Asian School-Conference on Physics and Technology of Nanostructured Materials(5 ; 2020 ; 30 Jul - 3 Aug ; Vladivostok); Азиатская школа-конференция по физике и технологии наноструктурированных материалов(5 ; 2013 ; 30 июля - 3 авг. ; Владивосток)
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    Forc analysis of interparticle interactions in biomineralized magnetic nanocomposites / S. V. Semenov, O. P. Ikkert, D. A. Balaev [et al.] // Магнитные материалы. Новые технологии : тез. докл. IX Байкал. междунар. конф. BICMM-2023 / чл. прогр. ком.: S. S. Aplesnin [et al.] ; чл. орг. ком. R. S. Iskhakov [et al.]. - Иркутск, 2023. - P. 143, DOI 10.26516/978-5-9624-2178-0.2023.1-207. - Библиогр.: 3 . - ISBN 978-5-00133-051-6
   Перевод заглавия: Forc-анализ межчастичных взаимодействий в биоминерализованных магнитных нанокомпозитах

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Держатели документа:
Kirensky Institute of Physics SB RAS
Tomsk State University

Доп.точки доступа:
Aplesnin, S. S. \чл. прогр. ком.\; Аплеснин, Сергей Степанович; Balaev, D. A. \чл. прогр. ком.\; Балаев, Дмитрий Александрович; Ovchinnikov, S. G. \чл. прогр. ком.\; Овчинников, Сергей Геннадьевич; Iskhakov, R. S. \чл. орг. ком.\; Исхаков, Рауф Садыкович; Semenov, S. V.; Семёнов, Сергей Васильевич; Ikkert, O. P.; Balaev, D. A.; Karnachuk, O. V.; Knyazev, Yu. V.; Князев, Юрий Владимирович; Байкальская международная конференция "Магнитные материалы. Новые технологии"(9 ; 2023 ; сент. ; 11-14 ; Байкальск); "Магнитные материалы. Новые технологии", Байкальская международная конференция(9 ; 2023 ; сент. ; 11-14 ; Байкальск); "Magnetic materials. New tecnologies", Baikal International Conference(9 ; 2023 ; Sept. ; 11-14 ; Baikalsk); Иркутский государственный университет
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