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Permanent Magnets Beyond Nd-Dy-Fe-B

IEEE Transactions on Magnetics

2018年10月15日(月)

Satoshi Hirosawa ( https://doi.org/10.1109/TMAG.2018.2863737 )

Abstract

Provision of a concise summary of recent developments of permanent magnet materials and the materials science underlining them toward realizing permanent magnets beyond the current Nd-Dy-Fe-B is attempted, and approaches to solving the remaining fundamental issues are discussed. Focused are two promising groups of materials: the ThMn12-type Fe-rich Sm(Fe1−xCox)12-based materials and the Nd2Fe14B-based materials. Materials science based on atomistic view of permanent magnet materials specifically developed for this purpose is required in order to break into a precise control of the microstructure in atomic levels with the aid of computational material engineering. Atomistic understandings of coercivity mechanism and differences in free energy associated with formation of non-equilibrium structures such as grain boundaries and interfaces with sub-phases are proposed to be essential.Index Terms—Atomistic micromagnetics, coercivity, computational thermodynamics, critical elements.

その他特記事項

A large part of this paper is based on the recent results of the studies at the Elements Strategy Initiative Center for Magnetic Materials (ESICMM) founded by Ministry of Education, Culture, Sports, Science and Technology, Japan, and the achievements mentioned therein are credited to ESICMM Principal Investigators.


研究活動

文部科学省

文部科学省
元素戦略プロジェクト(活動紹介)
NIMS磁石パートナーシップ

元素戦略拠点

触媒・電池元素戦略拠点
触媒・電池元素戦略研究拠点 (京都大学)
東工大元素戦略拠点
東工大元素戦略拠点 (東京工業大学)
構造材料元素戦略研究拠点
構造材料元素戦略研究拠点 (京都大学)
高効率モーター用磁性材料技術研究組合
高効率モーター用 磁性材料技術研究組合