摘要
制备了以Ta和非磁性N iFeCr作为缓冲层和保护层的N iFe/PtMn双层膜,研究了它们的结构和物性,结果表明:用N iFeCr做缓冲层和保护层的N iFe/PtMn双层膜,其交换偏置场比以Ta为缓冲层和保护层的N iFe/PtMn的交换偏置场有了10%的提高;退火处理以后,以N iFeCr为缓冲层和保护层的样品的磁性层N iFe的磁矩降低要小于以Ta为缓冲层和保护层的样品的磁性层N iFe的磁矩降低。同时,XRD测量计算发现,以N iFeCr为缓冲层生长的N iFe/PtMn样品比Ta为缓冲层生长的N iFe/PtMn样品具有更好的织构,更大的平均晶粒尺寸,因而具有更好的热稳定性。N iFeCr比Ta更适合做基于Mn合金为反铁磁层的缓冲层和保护层。
The structural and magnetic properties of NiFe/PtMn bilayers with Ta or NiFeCr as the seed and cap layers were investigated. It is found that the NiFe/PtMn bilayer with NiFeCr as seed and cap layers has higher exchange bias than that with Ta. After annealing, the reduction of the magnetization for the films with NiFeCr seed and cap layers is smaller than that with Ta as seed and cap layers. On the other hand, the grain size of the bilayers with NiFeCr seed layer is much larger than that of the films with Ta seed layer, which leads to a better thermal stability for the former. The results indicate that NiFeCr can be promising seed and cap layers in spin valves based on Mn -alloyed antiferromagnets.
出处
《功能材料与器件学报》
CAS
CSCD
北大核心
2006年第4期317-321,共5页
Journal of Functional Materials and Devices
基金
北京市教委基金资助课题
