多层膜线列阵的巨磁电阻和层间耦合  

GIANT MAGNETORESISTANCE AND INTERLAYER EXCHANGE COUPLING IN THE WIRE ARRAYS OF MULTILAYER 

作　　者：陈慧余[1] 孙勇[1] 李志超[1] 陈金昌[2] 郑鹉[2] 王艾玲[2] 

机构地区：[1]中国科学技术大学物理系 [2]首都师范大学物理系

出　　处：《物理学报》1998年第12期2046-2052,共7页Acta Physica Sinica

基　　金：北京市自然科学基金

摘　　要：研究了Ｆｅ／［ＮｉＦｅ／Ｃｕ］３０多层膜线列阵的室温磁电阻和磁滞特性，列阵的线密度为２５０和５００线／ｍｍ，采用激光全息光刻和离子束刻蚀技术制成．线列阵样品的磁性与刻线加工前的连续膜有明显区别．最大巨磁电阻率有增也有减，最大增量为３３２％．外场平行线轴的矫顽力有的增加有的不变．这除了因为原始连续膜层间耦合态有差异之外。Abstract The room temperature magnetoresistance (MR) and hysteresis in the wire arrays of Fe/ 30 muitilayer were investigated. These arrays were fabricated by laser lithography and ion beam etching techniques. The magnetic properties of the wire array is distinctly different compared with the continous film. the maximum MR ratio is increased for some arrays, and for some other arrays this MR ratio is decreased. A marked increased in coercivity of some arrays is seen for the field applied along the wire axis, but for some other arrays the coercivity almost remains constant. These results depend on the defferene in interlayer exchange coupling for original continous films and also depend on the uniaxial anisotroy and the other change caused by the wire fabrication of array.

关 键 词：层间耦合 多层膜 线列阵 巨磁电阻 

分 类 号：O484.8[理学—固体物理]