Serrated magnetic properties in metallic glass by thermal cycle  

作　　者：李明哲 Sajad Sohrabi 丁大伟 董帮少 周少雄 汪卫华 

机构地区：[1]Institute of Physics,Chinese Academy of Sciences [2]University of Chinese Academy of Sciences [3]China Iron & Steel Research Institute Group,Advanced Technology & Materials Co.,Ltd.

出　　处：《Chinese Physics B》2017年第6期271-274,共4页中国物理B（英文版）

基　　金：supported by the National Key Research and Development Plan,China(Grant No.2016YFB0300501);the Key Research Program of Frontier Sciences,Chinese Academy of Sciences(Grant No.QYZDY-SSW-JSC017);the National Natural Science Foundation of China(Grant Nos.51571209,51461165101,and 51301194);the National Basic Research Program of China(Grant No.2015CB856800)

摘　　要：Fe-based metallic glasses（MGs） with excellent soft magnetic properties are applicable in a wide range of electronic industry. We show that the cryogenic thermal cycle has a sensitive effect on soft magnetic properties of Fe78Si9B13 glassy ribbon. The values of magnetic induction（or magnetic flux density） B and Hc coercivity c show fluctuation with increasing number of thermal cycles. This phenomenon is explained as thermal-cycle-induced stochastically structural aging or rejuvenation which randomly fluctuates magnetic anisotropy and, consequently, the magnetic induction and coercivity. Overall,increasing the number of thermal cycles improves the soft magnetic properties of the ribbon. The results could help understand the relationship between relaxation and magnetic property, and the thermal cycle could provide an effective approach to improving performances of metallic glasses in industry.Fe-based metallic glasses（MGs） with excellent soft magnetic properties are applicable in a wide range of electronic industry. We show that the cryogenic thermal cycle has a sensitive effect on soft magnetic properties of Fe78Si9B13 glassy ribbon. The values of magnetic induction（or magnetic flux density） B and Hc coercivity c show fluctuation with increasing number of thermal cycles. This phenomenon is explained as thermal-cycle-induced stochastically structural aging or rejuvenation which randomly fluctuates magnetic anisotropy and, consequently, the magnetic induction and coercivity. Overall,increasing the number of thermal cycles improves the soft magnetic properties of the ribbon. The results could help understand the relationship between relaxation and magnetic property, and the thermal cycle could provide an effective approach to improving performances of metallic glasses in industry.

关 键 词：amorphous soft magnetic materials REJUVENATION AGING cryogenic thermal cycling 

分 类 号：TG139.8[一般工业技术—材料科学与工程]