Heterogeneous coarse surface crystallites induced in the industrial Fe-rich nanocrystalline alloy is an ob-stacle for high-frequency and high-power commercial applications.Herein,the phase,crystal orientation,nanostructure and magnetic domain evolution of the surface-crystallized Fe-rich alloy were systematically investigated.Microstructure and inverse pole figures analysis confirms that the DO3 ordered dendritic-crystallites bear<001>-oriented fiber texture before and after annealing at the free surface,while ultra-fine nanocrystals are randomly oriented in the interior and wheel surface after annealing.As compared to zero magnetic-field-annealing,the transverse magnetic-field-annealing induces weakly oriented fiber texture and relatively uniform dendritic-crystallites at the surface,and uniform anisotropy in the inte-rior and surface,which promotes smooth wall motion at the surface and magnetization rotation in the interior.This synergetic effect reduces the excess loss and leads reduction in dynamic loss at 1.0 T and 10 kHz by 36％.

Aina He;Jiawei Li;Mingkun Wang;Anding Wang;Yao Xiao;Yaqiang Dong;Hai Guo;Rongrong Jiang;Weixing Xia;Lihong Dong;Haidou Wang;Jianya Ge

CAS Key Laboratory of Magnetic Materials and Devices,Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology,Ningbo;Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Materials Science and Engineering,Dongguan University of Technology,Dongguan 523808,China;Ningbo Zhongke B Plus New Materials Technology Co.,Ltd,Ningbo 315201,China;National Key Lab for Remanufacturing,Army Academy of Armored Forces,Beijing 100072,China

材料科学技术（英文版）

[1]Aina He;Jiawei Li;Mingkun Wang;Anding Wang;Yao Xiao;Yaqiang Dong;Hai Guo;Rongrong Jiang;Weixing Xia;Lihong Dong;Haidou Wang;Jianya Ge-.Microstructure,magnetic domain and dynamic loss of surface-textured Fe-based nanocrystalline alloy)[J].材料科学技术（英文版）,2022(25):1-7

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