Magnetization process of cubic Fe3O4 submicron particles: First-order reversal curves and neutron diffraction studies

Авторы: Satoru Kobayashi, Nomura Eiji, Chiaki Noda, Manjanna Jayappa, Jargalan Narmandakh, Uyanga Enkhnaran, Bobrikov Ivan, Kiseleva Tatiana, Rusakov Vyacheslav, Sangaa Deleg
Журнал: Journal of Magnetism and Magnetic Materials
Том: 589
Год издания: 2024
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Первая страница: 1
Последняя страница: 10
Номер статьи: 171509
DOI: 10.1016/j.jmmm.2023.171509
Аннотация: We have studied magnetization process of 260 nm sized cubic Fe3O4 particles below and above the Verwey transition temperature 𝑇v ∼ 110 K, by measurements of magnetic first-order reversal curves (FORCs) and high-resolution power neutron diffraction. The FORC diagram exhibits two distinct FORC distribution peaks below 𝑇v, which shift towards the origin, merge into a single peak on heating, whereas only a single FORC peak appears above 𝑇v. Neutron diffraction measurements under magnetic fields revealed a minimum of the magnetic intensity at a magnetic field of ∼−300 Oe, being close to the reversal field where the FORC peak is located. These results were interpreted as due to a reorientation and reversal of a spin vortex core, which accompany a large magnetic irreversibility.
Добавил в систему: Русаков Вячеслав Серафимович

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