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The next generation of power electronics requires materials with rapid response at tens of kilohertz while minimizing core losses. Progress is limited by the shortage of ultra-low-loss soft magnets. We demonstrate a nanostructure-engineering approach with high-frequency domain control that boosts Fe-enriched amorphous ribbons, cutting core loss by 55% to ~75 ± 1.3 W/kg at 10 kHz, 1 T. This arises from optimized perpendicular anisotropy induced by positive magnetostriction and compressive stress from partial nanocrystallization of α-Fe in an amorphous matrix. The resulting narrow stripe-shaped domains (~4.8 ± 0.6 μm) suppress excess loss. Our findings mark a key step in soft magnet design, enabling energy-efficient, miniaturized power electronics.

権利情報:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

キーワード: Soft magnet, Core loss, Magnetic domain, Nanostructure

刊行年月日: 2025-09-03

出版者: Springer Science and Business Media LLC

掲載誌:

• Nature Communications (ISSN: 20411723) vol. 16 issue. 1 8022

研究助成金:

• INNOPEL

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1038/s41467-025-63139-1

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更新時刻: 2025-09-30 10:22:27 +0900

MDRでの公開時刻: 2025-09-30 12:18:38 +0900