热处理及厚度对Co_(90)Fe_(10)薄膜磁电阻的影响  

Effect of heat treatment and thickness on Co_(90)Fe_(10) thin film's Magnetoresistance

作　　者：陈森[1] 张师平[1] 吴平[1] 付建波[1] 谢剑桥[1] 魏家琦[1] 

机构地区：[1]北京科技大学数理学院,北京100083

出　　处：《实验室科学》2012年第6期90-93,共4页Laboratory Science

基　　金：北京科技大学研究型教学示范课建设项目(项目编号:JY2011SFK18);北京科技大学教育教学改革研究项目(项目编号:JG2011Z14)

摘　　要：利用电子束真空蒸发方法制备了不同厚度的Co90Fe10磁性薄膜,研究了热处理及厚度对薄膜磁电阻的影响。利用四探针法测量了薄膜的磁电阻,利用磁力显微镜观察了薄膜的磁畴结构。结果表明:热处理可以提高薄膜的磁电阻,尤其是厚度较小的样品,效果更加明显。对于厚度较大的薄膜,热处理可以改善磁织构,磁畴分布更加有序,出现了类巨磁电阻特征。Different thickness Co90Fe10 thin films were prepared by vacuum electron-beam deposition method,effects of heat treatment and thickness on Magnetoresistance（MR） of Co90Fe10 thin films were investigated.MR value of Co90Fe10 thin films was measured by four-point probe technology,structure of magnetic domains was observed by magnetic force microscope.The experiment results showed that heat treatment can improve the magnetoresistance especially on the thin film which has a thinner thickness.For the thicker thin film,heat treatment can improve magnetic texture,magnetic domain distributed more orderly and a kind of giant magneto resistance characteristics was observed.

关 键 词：Co90Fe10薄膜 热处理 磁电阻 磁畴 

分 类 号：O484[理学—固体物理]