Effect of Cu surface segregation on the exchange coupling field of NiFe/FeMn bilayers

作     者：LI Minghua YU Guanghua ZHU Fengwu JIANG Hongwei LAI Wuyan 

作者机构：Department of Materials PhysicsBeijing University of Science and TechnologyBeijing 100083China Institute of PhysicsChinese Academy of SciencesBeijing 100080China 

出 版 物：《Chinese Science Bulletin》 (Chin. Sci. Bull.)

年 卷 期：2001年第46卷第22期

页      面：1934-1936页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：This work was supported by the National Natural Science Foundation of China (Grant No. 19890310) 

主　　题：NiFe/FeMn exchange coupling field texture surface roughness surface segregation. 

摘      要：The NiFe/FeMn bilayers with different buffer layers (Ta or Ta/Cu) were prepared by magnetron sputtering. Results show that the exchange coupling field of NiFe/FeMn fllms with Ta buffer is higher than that of the films with Ta/ Cu buffer. We analysed the reasons by investigating the crystallographic texture, surface roughness and surface segregation of both fllms, respectively. We found that the decrease of the exchange coupling fields of NiFe/FeMn fllms with Ta/ Cu buffer layers was mainly caused by the Cu surface segregation on NiFe surface.