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Enhanced Giant Magnetoimpedance Effect in Rapid Heat-Treated Fe-Based Amorphous Ribbons

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【Author】 ZHANG Yi;DONG Juan;FENG Er-Xi;LUO Cai-Qin;LIU Qing-Fang;WANG Jian-Bo;Institute of Applied Magnetics,Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education,Lanzhou University;

【机构】 Institute of Applied Magnetics,Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education,Lanzhou University；

【摘要】 An enhanced giant magnetoimpedance（GMT） effect of Fe-based amorphous ribbons is obtained by rapid heat treatment.The structural investigations on the ribbon reveal the presence of two phases,i.e.a fine grained Fe₃Si phase and a residual amorphous phase on rapid heat treatment.The soft magnetic property is improved by rapid heat treatment;the crystal size and grain size of Fe₃Si decrease.The maximum magnetoimpedance ratio obtained in the present study is 81% at 10 MHz,and the optimized heat-treated rate is 200℃/min.Separated GMI curves are observed after the simultaneous rapid heat treatment and magnetic Beld annealing.This suggests that tailoring of the nanocrystalline microstructures induced by optimum rapid heat treatment conditions can result in an excellent GMI effect.更多还原

【Abstract】 An enhanced giant magnetoimpedance（GMT） effect of Fe-based amorphous ribbons is obtained by rapid heat treatment.The structural investigations on the ribbon reveal the presence of two phases,i.e.a fine grained Fe₃Si phase and a residual amorphous phase on rapid heat treatment.The soft magnetic property is improved by rapid heat treatment;the crystal size and grain size of Fe₃Si decrease.The maximum magnetoimpedance ratio obtained in the present study is 81% at 10 MHz,and the optimized heat-treated rate is 200℃/min.Separated GMI curves are observed after the simultaneous rapid heat treatment and magnetic Beld annealing.This suggests that tailoring of the nanocrystalline microstructures induced by optimum rapid heat treatment conditions can result in an excellent GMI effect.更多还原

【基金】 Supported by the National Basic Research Program of China under Grant No 2012CB933101;the National Natural Science Foundation of China under Grant Nos 11074101 and 51171075;the Fundamental Research Funds for the Central Universities under Grant Nos lzujbky-2012-k29 and lzujbky-2012-209;the Program for New Century Excellent Talents in University

【文献出处】 Chinese Physics Letters ,中国物理快报(英文版) , 编辑部邮箱 ,2013年03期

【分类号】O73

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