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Dynamic Remagnetisation of CoFe2O4 Nanoparticles:Thermal Fluctuational Thawing of Anisotropy Научная публикация

Журнал Journal of Physics D: Applied Physics
ISSN: 0022-3727 , E-ISSN: 1361-6463
Вых. Данные Год: 2021, Том: 54, Номер: 27, Номер статьи : 275003, Страниц : 11 DOI: 10.1088/1361-6463/abf371
Ключевые слова cobalt ferrite; effective anisotropy; magnetodynamics; nanoparticles; superparamagnetism
Авторы Balaev D A 1 , Poperechny I S 2,3 , Krasikov A A 1 , Semenov S V 1 , Popkov S I 1 , Knyazev Y V 1 , Kirillov V L 4 , Yakushkin S S 4 , Martyanov O N 4 , Raikher Yu L 2
Организации
1 Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk 660000, Russia
2 Institute of Continuous Media Mechanics, Russian Academy of Sciences, Ural Branch, Perm 614068, Russia
3 Department of Phase Transitions Physics, Perm State National Research University, Perm 614990, Russia
4 Boreskov Institute of Catalysis, Russian Academy of Sciences, Siberian Branch, Novosibirsk 630090, Russia

Информация о финансировании (2)

1 Министерство образования и науки Российской Федерации 0356-2016-0403 (АААА-А17-117103050081-1)
2 Министерство науки и высшего образования Российской Федерации (с 15 мая 2018) 075-00553-19-00 (АААА-А20-120020690030-5)

Реферат: We report a study of the magnetodynamics of cobalt ferrite (CoFe2O4) nanoparticles with an average diameter of ~6 nm. Hysteresis loops were measured under quasi-static conditions and in pulse fields with amplitudes H0 of up to 130 kOe and for durations τP of 8 and 16 ms. The growth of coercivity Hc observed with an increase in the magnetic field variation rate dH/dt (determined by the values of H0 and τP) and the reduction of Hc with temperature is ascribed to the superparamagnetic effect. The proposed theoretical model explains the observed dependences fairly well. Notably, the effective magnetic anisotropy constant obtained exceeds the value for bulk crystals and might be indicative of the contribution of surface magnetic anisotropy.
Библиографическая ссылка: Balaev D.A. , Poperechny I.S. , Krasikov A.A. , Semenov S.V. , Popkov S.I. , Knyazev Y.V. , Kirillov V.L. , Yakushkin S.S. , Martyanov O.N. , Raikher Y.L.
Dynamic Remagnetisation of CoFe2O4 Nanoparticles:Thermal Fluctuational Thawing of Anisotropy
Journal of Physics D: Applied Physics. 2021. V.54. N27. 275003 :1-11. DOI: 10.1088/1361-6463/abf371 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
Поступила в редакцию: 16 дек. 2020 г.
Принята к публикации: 30 мар. 2021 г.
Опубликована online: 23 апр. 2021 г.
Опубликована в печати: 8 июл. 2021 г.
Идентификаторы БД:
Web of science: WOS:000644173000001
Scopus: 2-s2.0-85105388499
РИНЦ: 46045550
Chemical Abstracts: 2021:1693715
Chemical Abstracts (print): 176:41791
OpenAlex: W3147981030
Цитирование в БД:
БД Цитирований
Web of science 10
Scopus 10
РИНЦ 16
OpenAlex 14
Альметрики: