Interlayer coupling and magnetoresistance in Ir/Co multilayers
Interlayer coupling and magnetoresistance in Ir/Co multilayers
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DOI：
10.1209/epl/i1998-00288-6
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发表时间：
1998-06
期刊：
影响因子：
1.8
通讯作者：
Yuansu Luo;M. Moske;K. Samwer
中科院分区：
文献类型：
--
作者：
Yuansu Luo;M. Moske;K. Samwer
制备了面心立方（111）取向的Ir/Co多层膜，研究了其磁性和磁输运性质。用X射线衍射对超晶格结构进行了表征。磁化强度和磁阻（ΔR/R）的测量结果显示出周期约为1 nm（4.5个单层）的振荡层间交换耦合。得到的耦合强度JAF和最大ΔR/R分别为− 2.05 mJ/m2和4%（10 K时）。所观察到的振荡行为可以归因于分离的Co磁性层的相互作用，这必须是某种RKKY耦合。使用这个概念，我们发现一个匹配的测量振荡周期与相关的波矢量的费米表面的Ir。
Fcc(111) oriented Ir/Co multilayers were prepared to study their magnetic and magnetotransport properties. The superlattice structure was characterized by X-ray diffraction. Results measured for magnetization and magnetoresistance (ΔR/R) exhibit an oscillatory interlayer exchange coupling with a period of about 1 nm (4.5 monolayers). The coupling strength JAF and the largest ΔR/R obtained are − 2.05 mJ/m2 and 4% (at 10 K), respectively. The observed oscillatory behavior can be attributed to an interaction of separated Co magnetic layers, which must be some sort of RKKY coupling. Using this concept, we find a match of the measured oscillation period with the relevant wave vector on the Fermi surfaces of Ir.