Theoretical and experimental investigation on giant magnetoresistive materials with amorphous ferromagnetic layer  

作　　者：文岐业 张怀武 宋远强 蒋向东 

机构地区：[1]School of Microelectronic and Solid-state Electronic,University of Electronic Science and Technology of China,Chengdu 610054,China

出　　处：《中国有色金属学会会刊：英文版》2006年第B01期59-62,共4页Transactions of Nonferrous Metals Society of China

基　　金：Project (90306015) supported by NSFC; Project supported by Youth Foundation of Science and Technology of UESTC

摘　　要：Pseudo-spin-valve (PSV) sandwiches using amorphous CoNbZr alloy as soft magnetic layer were fabricated by magnetron sputtering. The giant magnetoresistance (GMR) and its dependence on the thickness of magnetic layer were investigated. Anti-parallel magnetization alignments were observed in the samples with very thin CoNbZr thickness (2-4 nm) and a maximum GMR ratio of 6.5% was obtained. The Camley-Barnas semiclassical model was extended for amorphous layer based magnetic sandwiches by considering that the mixed layers exist between the ferromagnetic and nonmagnetic layer. The calculated results agree with the experimental results very well, indicating that the new model gives a more realistic picture of the physical processes that take place in the magnetic sandwiches. Moreover, the calculated results for amorphous sandwiches also clarify that the occurrence of maximum GMR at very small thickness of amorphous layer is ascribed to the short mean-free-path in amorphous materials.Pseudo-spin-valve （PSV） sandwiches using amorphous CoNbZr alloy as soft magnetic layer were fabricated by magnetron sputtering. The giant magnetoresistance （GMR） and its dependence on the thickness of magnetic layer were investigated. Anti-parallel magnetization alignments were observed in the samples with very thin CoNbZr thickness （2-4 nm） and a maximum GMR ratio of 6.5% was obtained. The Camley-Barnas semiclassical model was extended for amorphous layer based ：nagnetic sandwiches by considering that the mixed layers exist between the ferromagnetic and nonmagnetic layer. The calculated results agree with the experimental results very well, indicating that the new model gives a more realistic picture of the physical processes that take place in the magnetic sandwiches. Moreover, the calculated results for amorphous sandwiches also clarify that the occurrence of maximum GMR at very small thickness of amorphous layer is ascribed to the short mean-flee-path in amorphous materials.

关 键 词：非晶态铁磁层 巨磁阻材料 Camley-Barnas模型 理论研究 实验研究 

分 类 号：TB39[一般工业技术—材料科学与工程]