热处理对[NiFe/Cu/Co/Cu]_n多层纳米线磁性能的影响  

Effects of Annealing on the Magnetic Properties of [NiFe/Cu/Co/Cu]_n Multilayer Nanowire Arrays

作　　者：张卫国[1] 马晓龙[1] 许琰[1] 姚素薇[1] 王宏智[1] 

机构地区：[1]天津大学化工学院杉山表面技术研究室,天津300072

出　　处：《物理化学学报》2014年第4期768-772,共5页Acta Physico-Chimica Sinica

基　　金：天津市自然科学基金(G08JCZDJC17400)资助项目~~

摘　　要：采用双槽控电位法在阳极氧化铝(AAO)模板中制备了有序均一的[NiFe/Cu/Co/Cu]n多层纳米线阵列,并在不同温度下进行了热处理.利用X射线衍射(XRD)对热处理前后多层线的晶体结构进行了测试.考察了不同退火温度对多层线矫顽力、剩磁比、巨磁电阻(GMR)效应、磁灵敏度的影响.随热处理温度升高,多层纳米线中磁性微晶晶型取向越来越明显,晶体结构更均匀;多层纳米线的矫顽力和剩磁比先增大后减小.300°C下多层纳米线矫顽力达到最大值,GMR最大值可达59%,对应的磁电阻灵敏度(SV)为0.233%Oe-1.Highly ordered [NiFelCulColCu]n multilayer nanowire arrays were successfully prepared by a combination of electrodeposition and the anodic aluminum oxide （AAO） template method. The crystalline structures obtained at different annealing temperatures were characterized by high-angle X-ray diffraction （XRD）. The coercivity, remanence ratio, giant magneto resistive （GMR）, and magnetic sensitivity of the [NiFelCulColCu]n multilayer nanowire arrays were investigated at different annealing temperatures. After heating, the multilayer nanowires magnetic microcrystalline orientation was more obvious and the crystal structure was more uniform. The multilayer nanowires coercivity and remanence ratio increased initially and then decreased at 300 ℃. A maximum coercivity and GMR value of 59% was achieved with a magnetic sensitivity of up to 0.233% Oe-1 at 300 ℃.

关 键 词：多层纳米线 电沉积 热处理 [NiFe CulColCu]n 巨磁电阻 

分 类 号：TB383.1[一般工业技术—材料科学与工程]