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Ta/NiFe/Cu/NiFe/FeMn/Ta自旋阀多层膜中Cu的层间偏聚及其对磁性的影响
Authors
于广华
姜宏伟
+4 more
朱逢吾
李明华
柴春林
赖武彦
Publication date
1 January 2003
Publisher
Abstract
实验结果表明Ta/NiFe/FeMn/Ta多层膜的交换耦合场Hex要大于Ta/NiFe/Cu /NiFe/FeMn/Ta自旋阀多层膜中的Hex. 为了寻找其原因, 用X射线光电子能谱(XPS)研究了Ta(12 nm)/NiFe(7 nm), Ta(12 nm)/NiFe(7 nm)/Cu(4 nm)和Ta(12 nm)/NiFe(7 nm)/ Cu(3 nm)/NiFe(5 nm) 3种样品, 研究结果表明前两种样品表面无任何来自下层的元素偏聚, 但在第3种样品最上层的NiFe表面上, 探测到从下层偏聚上来的Cu原子. 认为: Cu在NiFe/FeMn层间的存在是Ta/NiFe/Cu/NiFe/FeMn/Ta自旋阀多层膜的Hex低于Ta/NiFe/FeMn/Ta多层膜Hex的一个重要原因
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Last time updated on 15/03/2019