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

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

机构地区：[1]School of Materials Science and Engineering,School of Metallurgical Engineering,Anhui University of Technology,Ma’anshan 243002,China [2]Wuhu Technology and Innovation Research Institute,Wuhu 242000,China [3]School of Materials Science and Engineering,Instrumental Analysis Center,Southeast University,Nanjing 211189,China [4]Institute of Advanced Magnetic Materials,College of Materials and Environmental Engineering,Hangzhou Dianzi University,Hangzhou 310012,China [5]Guangxi Key Laboratory for Informational Materials&School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China

出　　处：《Journal of Materials Science & Technology》2024年第33期27-37,共11页材料科学技术(英文版)

基　　金：supported by the Anhui Provincial Natural Science Foundation(No.2208085QE121);the Key Research&Development plan of Anhui Province(No.2022a05020016);the University Natural Science Research Project of Anhui Province(No.2023AH051084);the National Natural Science Foundation of China(No.52071078);the“Zhishan”Scholars Programs of Southeast University(No.2242021R41158).

摘　　要：The inverse relationship between the saturation magnetic flux density(Bs)and coercivity(Hc)of Febased 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 Fe_(83.2-x)Co_(x)B_(10)C_(6)Cu_(0.8)(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%reduction 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 theoretical 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 mechanism for tuning Hc in Co-doped alloy systems and affords a possible pathway for softening amorphous alloys with high Bs.

关 键 词：Amorphous alloy De-stressing magnetic field annealing Magnetic softness Microstructure Magnetic anisotropy 

分 类 号：TG1[金属学及工艺—金属学]