Giant Magneto-Impedance of Co50Ni22Ga28 Alloy with High Chemical Ordering  

作　　者：王岩国 王海英 戴学芳 吴光恒 段晓峰 

机构地区：[1]Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100080

出　　处：《Chinese Physics Letters》2005年第10期2630-2632,共3页中国物理快报（英文版）

基　　金：Supported by the National High Technology Research and Development Programme of China under Grant No 2003AA327010, and the National Natural Science Foundation of China under Grant No 60271028.

摘　　要：The microstructure of CosoNi22Ga28 ribbon with the L10 structure is examined. The band-like morphology is observed. These bands with the width in a range of 40-200 nm appear along the transverse direction of the ribbon. The giant magnetoimpedance （GMI） effect in this alloy is measured. The results show that Co5oNi22Ga28 exhibits a sharp peak of the GAI effect. The maximum GAH ratio up to 360% is detected. The GMI effect measured versus temperature shows large jumps of the magnetoimpedance amplitude at the reversal martensitic transformation temperature 240℃ and Curie temperature 375℃C respectively. The jump ratios of the magnetoimpedance amplitude examined at these temperatures are about 5 and 10, respectively.The microstructure of CosoNi22Ga28 ribbon with the L10 structure is examined. The band-like morphology is observed. These bands with the width in a range of 40-200 nm appear along the transverse direction of the ribbon. The giant magnetoimpedance （GMI） effect in this alloy is measured. The results show that Co5oNi22Ga28 exhibits a sharp peak of the GAI effect. The maximum GAH ratio up to 360% is detected. The GMI effect measured versus temperature shows large jumps of the magnetoimpedance amplitude at the reversal martensitic transformation temperature 240℃ and Curie temperature 375℃C respectively. The jump ratios of the magnetoimpedance amplitude examined at these temperatures are about 5 and 10, respectively.

关 键 词：SHAPE-MEMORY ALLOY MARTENSITIC-TRANSFORMATION MAGNETOSTRICTION MAGNETOIMPEDANCE RIBBON WIRES 

分 类 号：TG133[一般工业技术—材料科学与工程]