Poster Tomography-based Micromagnetic Simulations of Nd-Fe-B Magnets: the Role of Intergranular Phase Nonuniformities

BOLYACHKIN Anton SAMURAI ORCID (International Center for Young Scientists, National Institute for Materials ScienceROR) ; DENGINA Ekaterina (Research Center for Magnetic and Spintronic Materials/Green Magnetic Materials Group, National Institute for Materials ScienceROR) ; KULESH Nikita SAMURAI ORCID (Research Center for Magnetic and Spintronic Materials/Green Magnetic Materials Group, National Institute for Materials ScienceROR) ; TANG Xin SAMURAI ORCID (International Center for Young Scientists, National Institute for Materials ScienceROR) ; SEPEHRI AMIN Hossein SAMURAI ORCID (Research Center for Magnetic and Spintronic Materials/Green Magnetic Materials Group, National Institute for Materials ScienceROR) ; OHKUBO Tadakatsu SAMURAI ORCID (Research Center for Magnetic and Spintronic Materials, National Institute for Materials ScienceROR) ; HONO Kazuhiro SAMURAI ORCID (National Institute for Materials ScienceROR)

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BOLYACHKIN Anton, DENGINA Ekaterina, KULESH Nikita, TANG Xin, SEPEHRI AMIN Hossein, OHKUBO Tadakatsu, HONO Kazuhiro. Tomography-based Micromagnetic Simulations of Nd-Fe-B Magnets: the Role of Intergranular Phase Nonuniformities. https://doi.org/10.48505/nims.4856
SAMURAI

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(abstract)

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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Keyword: Nd-Fe-B magnets, Micromagnetic simulations, FIB-SEM tomography

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

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Manuscript type: Not a journal article

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

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Updated at: 2024-10-17 08:30:28 +0900

Published on MDR: 2024-10-17 08:30:28 +0900

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