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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 Carlo 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: atomistic spin model, thermal fluctuation, permanent magnets, stochastic Landau-Lifshitz-Gilbert equation, Monte Carlo method

刊行年月日: 2025-01-01

出版者: Japan Institute of Metals

掲載誌:

• MATERIALS TRANSACTIONS (ISSN: 13459678) vol. 66 issue. 1 p. 1-16 MT-M2024132

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原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.2320/matertrans.mt-m2024132

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更新時刻: 2025-11-28 16:30:11 +0900

MDRでの公開時刻: 2025-11-28 16:21:58 +0900