首页|Tailoring magnetic softness of Fe-based amorphous alloys with superior magnetization by magnetic field annealing

Tailoring magnetic softness of Fe-based amorphous alloys with superior magnetization by magnetic field annealing

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The inverse relationship between the saturation magnetic flux density(Bs)and coercivity(Hc)of Fe-based amorphous alloys is a very active research topic that has been extensively debated.In this work,we conducted a detailed investigation on the magnetic softness of Fe83.2-xCoxB10C6Cu0.8(x=0 and 6 at.％)amorphous alloys based on analysis of the surface morphology,microstructure,magnetic anisotropy,and magnetic domain structure.Enhanced magnetic softness-magnetization synergy was realized in the present alloys by magnetic field annealing(MFA)during the de-stressing process.A dramatic 84％re-duction of Hc to 2.2 A/m was achieved for the Co-doped alloy under MFA,exhibiting excellent magnetic performance with a superb Bs of 1.86 T.The consistency between the experimental results and theoreti-cal analysis revealed that the MFA process can mitigate the trade-off between stress-induced anisotropy and induced uniaxial anisotropy owing to the homogenized structure formed by field annealing.Thus,the process favored a low Hc due to the significant continuous decline in the total magnetic anisotropy,which coincided well with the results of Magneto-optical Kerr microscopy.The study elucidates a mech-anism for tuning Hc in Co-doped alloy systems and affords a possible pathway for softening amorphous alloys with high Bs.

Amorphous alloyDe-stressing magnetic field annealingMagnetic softnessMicrostructureMagnetic anisotropy

Long Hou、Benjun Wang、Li Liu、Xinhao Mao、Mingya Zhang、Chenchen Yuan、Zhong Li、Wenwei Ju、Hanchen Feng、Chengying Tang、Ailin Xia、Weihuo Li

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School of Materials Science and Engineering,School of Metallurgical Engineering,Anhui University of Technology,Ma'anshan 243002,China

Wuhu Technology and Innovation Research Institute,Wuhu 242000,China

School of Materials Science and Engineering,Instrumental Analysis Center,Southeast University,Nanjing 211189,China

Institute of Advanced Magnetic Materials,College of Materials and Environmental Engineering,Hangzhou Dianzi University,Hangzhou 310012,China

Guangxi Key Laboratory for Informational Materials & School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China

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2024

10.1016/j.jmst.2024.02.043

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.200(33)