Distribution of magnetic moments in Co/Pt and Co/Pt/Ir/Pt multilayers detected by magnetic x‐ray absorption
Distribution of magnetic moments in Co/Pt and Co/Pt/Ir/Pt multilayers detected by magnetic x‐ray absorption
复制标题
通过磁 X 射线吸收检测 Co/Pt 和 Co/Pt/Ir/Pt 多层膜中的磁矩分布
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
H. Ebert
中科院分区：
文献类型：
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作者：
G. Schütz;S. Stähler;M. Knülle;P. Fischer;S. Parkin;H. Ebert
在多层结构 25⋅(4 A Co+30 A Pt) 和 25⋅(4 A Co+11 A Pt+8 A Ir+11 A Pt) 中的 Pt 和 Ir L2,3 边缘处观察到圆磁 X 射线二色性（CMXD）。样品通过溅射制备并表现出较大的垂直各向异性。在垂直于表面的 0.15 T 外部磁场中测量 Pt 和 Ir L2,3 边缘处的磁吸收。结果表明 Pt 和 Ir 层存在显着的自旋极化。通过与铁磁铁主体中 Pt 和 Ir 杂质的相应 CMXD 信号进行比较，我们估计了局部自旋和轨道矩。结果表明，两个系统中最里面的三个单层与 Co 层以铁磁方式耦合，平均磁矩约为 0.01 μB。
Circular magnetic x‐ray dichroism (CMXD) was observed at the Pt and Ir L2,3 edges in the multilayered structures 25⋅(4 A Co+30 A Pt) and 25⋅(4 A Co+11 A Pt+8 A Ir+11 A Pt). The samples were prepared by sputtering and show a large perpendicular anisotropy. The magnetic absorption at the Pt and Ir L2,3 edges was measured in an external magnetic field of 0.15 T perpendicular to the surface. The results indicate a significant spin polarization of the Pt and Ir layers. By comparison with the corresponding CMXD signals of Pt and Ir impurities in a ferromagnetic iron host we estimated the local spin and orbital moments. The results show that the innermost three monolayers in both systems couple ferromagnetically to the Co layers with an average magnetic moment of about 0.01 μB.