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In this report, we present a large-scale micromagnetic model of hot-deformed Nd-Fe-B magnets constructed based on a FIB-SEM tomographic data. This model can accurately reproduce the microstructure of real magnets. In particular, the IGP is represented by a set of thin individual regions localized between contacting faces of adjacent platelet-shaped grains. All such IGPs are isolated from each other by triple junctions. Here we performed micromagnetic simulations to study how the variations of both IGP thickness and magnetization, which have been experimentally observed, affect the coercivity of the hot-deformed Nd-Fe-B magnets. Also, we will emphasize another important factor for coercivity engineering that is triple junctions.

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キーワード: Nd-Fe-B magnets, Micromagnetic simulations, FIB-SEM tomography

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会議: 27th International Workshop on Rare Earth and Future Permanent Magnets and Their Applications (2023-09-03 - 2023-09-07)

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原稿種別: 論文以外のデータ

MDR DOI: https://doi.org/10.48505/nims.4856

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更新時刻: 2024-10-17 08:30:28 +0900

MDRでの公開時刻: 2024-10-17 08:30:28 +0900