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代替タイトル: Atomistic Model Study on Magnetic Properties of Permanent Magnets―Treatment of Thermal Fluctuation and Thermal Effects, and Future Perspective―

説明:

We review atomistic spin model studies, a new approach for theoretical investigations, on magnetic properties of permanent magnets. In the atomistic modeling, the microscopic details of magnetic parameters and lattice structures are realistically considered, and the temperature effect, including thermal fluctuation, is properly treated based on statistical physics methods: Monte Caro methods and stochastic Landau–Lifshitz–Gilbert equation methods. We introduce how to treat thermal effects for static and dynamical properties using these methods. Focusing especially on neodymium permanent magnets, we discuss features of magnetization, domain wall, coercivity of a grain, nucleation and pinning fields, and dysprosium substitution effect, which were first elucidated with those methods.

権利情報:

• In Copyright
  

キーワード: 原子論的スピンモデル　, 永久磁石, 熱揺らぎ, 温度効果, 保磁力

刊行年月日: 2023-05-01

出版者: Japan Institute of Metals

掲載誌:

• Journal of the Japan Institute of Metals and Materials (ISSN: 00214876) vol. 87 issue. 5 p. 158-172

研究助成金:

• ESICMM JPMXP0112101004 (Element Strategy Initiative)

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.2320/jinstmet.JA202202

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更新時刻: 2024-01-05 22:11:51 +0900

MDRでの公開時刻: 2023-10-18 13:30:10 +0900