Magnetic moment in the top Pt layer of Co/Pt bilayers
Magnetic moment in the top Pt layer of Co/Pt bilayers
复制标题
Co/Pt 双层顶部 Pt 层的磁矩
DOI：
10.1238/physica.topical.115a00580
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发表时间：
2005
期刊：
影响因子：
2.9
通讯作者：
H. Maruyama
中科院分区：
文献类型：
--
作者：
M. Suzuki;H. Miyagawa;N. Kawamura;H. Muraoka;Y. Inaba;T. Shimatsu;Y. Sonobe;Y. Isohama;N. Nakamura;N. Ishimatsu;H. Maruyama
通过 Pt L2,3 边缘的 X 射线磁圆二色光谱研究了 15 nm 厚 Co 薄膜上的几个原子 Pt 层的磁性。使用磁光和规则分离 Pt 5d 电子的自旋和轨道磁矩。使用一系列具有不同 Pt 厚度的薄膜的数据确定 Pt 磁化强度分布与距 Co-Pt 界面距离的函数关系。该磁化曲线近似为衰减长度为 0.41 nm 的指数函数，表征了 Co 和 Pt 之间磁耦合的有效范围。界面处 Pt 原子的总磁矩为 0.7 μB/原子，包括 13% 轨道矩。这是在覆盖有薄层 Pt 的磁记录介质的热稳定性的背景下讨论的。
The magnetic properties of a few atomic Pt layers on a 15 nm thick Co film were studied by x-ray magnetic circular dichroism spectroscopy at the Pt L2,3 edges. The spin and orbital magnetic moments of the Pt 5d electrons were separated using the magneto-optical sum rules. The Pt magnetization profile as a function of distance from the Co–Pt interface was determined using data from a series of films with various Pt thicknesses. This magnetization profile was approximated by an exponential function with a decay length of 0.41 nm, which characterizes the effective range of the magnetic coupling between Co and Pt. The total magnetic moment of a Pt atom at the interface was 0.7 μB/atom including a 13% orbital moment. This is discussed in the context of the thermal stability of magnetic recording media capped with a thin layer of Pt.