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Intrinsic coercivity induced by valence fluctuations in Ce(Co1-xCux)5 permanent magnet
https://repo.qst.go.jp/records/83510
https://repo.qst.go.jp/records/835108b24f5fa-91d6-46c5-98c4-5b62610d5055
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2021-10-04 | |||||
| タイトル | ||||||
| タイトル | Intrinsic coercivity induced by valence fluctuations in Ce(Co1-xCux)5 permanent magnet | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Hiroaki, Shishido
× Hiroaki, Shishido× Tetsuro, Ueno× Kotaro, Saito× Masahiro, Sawada× Munehisa, Matsumoto× Tetsuro, Ueno |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In rare-earth permanent magnets, magnetization and Curie temperature are mainly dominated by 3d-electrons of Fe-group elements, and magnetic anisotropy arises from 4f-electrons, typically as an outcome from the combination of the crystal field effect and the spin-orbit interaction (SOI). Here we propose enhancement of an intrinsic coercivity due to the valence fluctuation derived from the 4f-electrons in Ce-based rare-earth magnets. Valence-fluctuations combined with SOI bring an effective magnetic anisotropy driven by kinetic energy in the hybridization of delocalized 4f-electrons and conduction electrons. This kinetic-energy-driven anisotropy has an order of magnitude stronger energy scale than the magnetic anisotropy driven by potential energy of well localized 4f-electrons in the crystal fields. The relatively strong coupling between 4f-3d electrons make such kinetic-energy driven anisotropy robust against high temperatures. This mechanism of intrinsic magnetic anisotropy is not only scientifically intriguing but also promising for application to permanent magnets. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | International Conference on Strongly Correlated Electron Systems (SCES 2020/21) | |||||
| 発表年月日 | ||||||
| 日付 | 2021-09-27 | |||||
| 日付タイプ | Issued | |||||
