(Pt/Co)_n/FeMn交换偏置多层膜磁性和结构分析  

Preparation and Structure Analysis of(Pt/Co)_n/FeMn Exchange Bias Multilayers with Perpendicular Anisotropy

作　　者：翟中海[1,2] 王逊[1] 侯祥林[1] 马振宁[1] 李宝河[3] 于广华[2] 

机构地区：[1]沈阳建筑大学理学院,辽宁沈阳110168 [2]北京科技大学材料物理与化学系,北京100083 [3]北京工商大学物理系,北京100037

出　　处：《沈阳建筑大学学报（自然科学版）》2012年第4期748-752,758,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51176131);辽宁省教育厅2009年度高等学校科研项目计划(2009A599)

摘　　要：目的研究具有垂直各向异性(Pt/Co)n和(Pt/Co)n/FeMn多层膜的磁性和结构关系.方法采用磁控溅射方法制备了以Pt为缓冲层和保护层的具有垂直各向异性(Pt/Co)n和(Pt/Co)n/FeMn多层膜.利用交变梯度磁强计(AGFM)测量样品的磁滞回线和X射线衍射分析样品的结构.结果在玻璃基片上成功制备了具有垂直各向异性的多层膜(Pt/Co)n和(Pt/Co)n/FeMn,20层和5层的(Pt/Co)n多层膜均具有良好的垂直各向异性,X射线衍射峰位随Co和Pt的厚度变化而改变,与理论公式的计算相符合,并且观测到交换偏置现象.结论具有fcc(111)织构的(Pt/Co)n多层膜有良好的垂直各向异性,FeMn以磁控溅射方式成长在具有fcc(111)织构的Pt/Co多层膜上也可以诱发反铁磁γ相.The aim of this paper is to analyze the relation between the magnetism and the structure of（ Pt/ Co） n and（Pt/Co） n/FeMn. The magnetron sputtering was adopted to prepare（Pt/Co） n and（Pt/Co） nFeMn multilayers with perpendicular anisotropy, using Pt as buffer and protection layer. The hysteresis loop of the specimen was measured by Alternating Gradient Force Magnetometer （AGFM）, and the structure was ana- lyzed by X-ray diffraction. The （Pt/Co）n and（Pt/Co） n/FeMn multilayers with perpendicular anisotropy was prepared successfully on the glass substrate, and the exchange bias was observed. The results show that when the number of modulation cycle were 20 or 5, （Pt/Co）n multi-layers has better perpendicular anisotropy. And the（ 111 ）peak and the corresponding low angle refraction peaks change with the thickness of Co and Pt. The results are in according with the theoretical calculation. The antiferromagnetic nphase can also be in- duced by preparing the FeMn growing on Pt/Co multilayer with fcc （ 111 ） texture via magnetron sputtering.

关 键 词：垂直各向异性 交换偏置 多层膜 X射线衍射 

分 类 号：TM271[一般工业技术—材料科学与工程]