The Low-Temperature Magnetic State and Magnetic Ordering Temperature of ε-Fe2O3 Iron Oxide Nanoparticles Научная публикация
| Журнал |
IEEE Magnetics Letters
ISSN: 1949-307X , E-ISSN: 1949-3088 |
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| Вых. Данные | Год: 2019, Том: 10, Номер статьи : 6110103, Страниц : 3 DOI: 10.1109/LMAG.2019.2956674 | ||||
| Ключевые слова | Fe2O3 nanoparticles; FMR spectra; magnetic transition | ||||
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| Организации |
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Информация о финансировании (1)
| 1 | Российский научный фонд | 17-12-01111 |
Реферат:
The ϵ-Fe2O3 iron oxide polymorph is a well-known magnetic material with a complex magnetic structure, which undergoes a series of magnetic transitions in different temperature ranges. However, the ϵ-Fe2O3 phase diagram is still unclear. We report on the magnetic properties of a sample consisting of ϵ-Fe2O3 nanoparticles with an average size of 8 nm embedded in a SiO2 xerogel matrix without an admixture of foreign phases. Along with the features typical of the well-known ϵ-Fe2O3 magnetic transition in the temperature range 80–150 K, the temperature dependence of magnetization M ( T ) of ϵ-Fe 2 O 3 includes other low-temperature anomalies. In an external field of H = 70 kOe, there is a noticeable temperature hysteresis of magnetization at 50–90 K, and near T ≈ 50 K, the M ( T ) curves have a characteristic bending, which may be indicative of an additional magnetic transition. The ferromagnetic resonance spectra shows that, near 500 K, a magnetic phase transition occurs, which was previously thought to be a transition to the paramagnetic state. An analysis of the temperature dependence of the ferromagnetic resonance spectra shows that the magnetically ordered phase in ϵ-Fe2O3 exists up to about 800 K.
Библиографическая ссылка:
Dubrovskiy A.A.
, Semenov S.V.
, Knyazev Y.V.
, Popkov S.I.
, Yakushkin S.S.
, Kirillov V.L.
, Martyanov O.N.
, Balaev D.A.
The Low-Temperature Magnetic State and Magnetic Ordering Temperature of ε-Fe2O3 Iron Oxide Nanoparticles
IEEE Magnetics Letters. 2019. V.10. 6110103 :1-3. DOI: 10.1109/LMAG.2019.2956674 WOS Scopus РИНЦ CAPlus OpenAlex
The Low-Temperature Magnetic State and Magnetic Ordering Temperature of ε-Fe2O3 Iron Oxide Nanoparticles
IEEE Magnetics Letters. 2019. V.10. 6110103 :1-3. DOI: 10.1109/LMAG.2019.2956674 WOS Scopus РИНЦ CAPlus OpenAlex
Даты:
| Поступила в редакцию: | 3 окт. 2019 г. |
| Принята к публикации: | 30 окт. 2019 г. |
| Опубликована online: | 29 нояб. 2019 г. |
Идентификаторы БД:
| Web of science: | WOS:000505528100001 |
| Scopus: | 2-s2.0-85075953921 |
| РИНЦ: | 43215216 |
| Chemical Abstracts: | 2020:2145864 |
| OpenAlex: | W2991641388 |