Features of the Pulsed Magnetization Switching in a High-Coercivity Material Based on ε-Fe2O3 Nanoparticles Научная публикация
| Журнал |
Physics of the Solid State
ISSN: 1063-7834 , E-ISSN: 1090-6460 |
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| Вых. Данные | Год: 2020, Том: 62, Номер: 3, Страницы: 445-453 Страниц : 9 DOI: 10.1134/S1063783420030166 | ||||
| Ключевые слова | coercivity; dynamic magnetization switching; ε-Fe2O3 nanoparticles | ||||
| Авторы |
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| Организации |
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Информация о финансировании (1)
| 1 | Российский фонд фундаментальных исследований | 18-42-240012 (АААА-А18-118102390052-8) |
Реферат:
The magnetic structure of the ε-Fe2O3 iron oxide polymorphic modification is collinear ferrimagnetic in the range from room temperature to ~150 K. As the temperature decreases, ε-Fe2O3 undergoes a magnetic transition accompanied by a significant decrease in the coercivity Hc and, in the low-temperature range, the compound has a complex incommensurate magnetic structure. We experimentally investigated the dynamic magnetization switching of the ε-Fe2O3 nanoparticles with an average size of 8 nm in the temperature range of 80–300 K, which covers different types of the magnetic structure of this iron oxide. A bulk material consisting of xerogel SiO2 with the ε-Fe2O3 nanoparticles embedded in its pores was examined. The magnetic hysteresis loops under dynamic magnetization switching were measured using pulsed magnetic fields Hmax of up to 130 kOe by discharging a capacitor bank through a solenoid. The coercivity Нс upon the dynamic magnetization switching noticeably exceeds the Нс value under the quasi-static conditions. This is caused by the superparamagnetic relaxation of magnetic moments of particles upon the pulsed magnetization switching. In the range from room temperature to ~ 150 K, the external field variation rate dH/dt is the main parameter that determines the behavior of the coercivity under the dynamic magnetization switching. It is the behavior that is expected for a system of single-domain ferro- and ferrimagnetic particles. Under external conditions (at a temperature of 80 K) when the ε-Fe2O3 magnetic structure is incommensurate, the coercivity during the pulsed magnetization switching depends already on the parameter dH/dt and is determined, to a great extent, by the maximum applied field Hmax. Such a behavior atypical of systems of ferrimagnetic particles is caused already by the dynamic spin processes inside the ε-Fe2O3 particles during fast magnetization switching. © 2020, Pleiades Publishing, Ltd.
Библиографическая ссылка:
Popkov S.I.
, Krasikov A.A.
, Semenov S.V.
, Dubrovskii A.A.
, Yakushkin S.S.
, Kirillov V.L.
, Mart’yanov O.N.
, Balaev D.A.
Features of the Pulsed Magnetization Switching in a High-Coercivity Material Based on ε-Fe2O3 Nanoparticles
Physics of the Solid State. 2020. V.62. N3. P.445-453. DOI: 10.1134/S1063783420030166 WOS Scopus РИНЦ CAPlus OpenAlex
Features of the Pulsed Magnetization Switching in a High-Coercivity Material Based on ε-Fe2O3 Nanoparticles
Physics of the Solid State. 2020. V.62. N3. P.445-453. DOI: 10.1134/S1063783420030166 WOS Scopus РИНЦ CAPlus OpenAlex
Оригинальная:
Попков С.И.
, Красиков А.А.
, Семенов С.В.
, Дубровский А.А.
, Якушкин С.С.
, Кириллов В.Л.
, Мартьянов О.Н.
, Балаев Д.А.
Особенности импульсного перемагничивания высококоэрцитивного материала на основе наночастиц ε-Fe2O3
Физика твердого тела. 2020.
Т.62. №3. С.395-402. DOI: 10.21883/FTT.2020.03.49003.609RSCI
РИНЦ
OpenAlex
Особенности импульсного перемагничивания высококоэрцитивного материала на основе наночастиц ε-Fe2O3
Физика твердого тела. 2020.
Т.62. №3. С.395-402. DOI: 10.21883/FTT.2020.03.49003.609RSCI
РИНЦ
OpenAlex
Даты:
| Поступила в редакцию: | 17 окт. 2019 г. |
| Принята к публикации: | 17 окт. 2019 г. |
| Опубликована в печати: | 1 мар. 2020 г. |
| Опубликована online: | 27 апр. 2020 г. |
Идентификаторы БД:
| Web of science: | WOS:000529101600009 |
| Scopus: | 2-s2.0-85084000340 |
| РИНЦ: | 43268303 |
| Chemical Abstracts: | 2020:825705 |
| OpenAlex: | W3022025519 |