Spin polarization and exchange coupling of Cu and Mn atoms in paramagnetic CuMn diluted alloys induced by a Co layer
Spin polarization and exchange coupling of Cu and Mn atoms in paramagnetic CuMn diluted alloys induced by a Co layer
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Co 层诱导的顺磁 CuMn 稀合金中 Cu 和 Mn 原子的自旋极化和交换耦合
DOI：
10.1103/physrevb.82.184412
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发表时间：
2010
影响因子：
3.7
通讯作者：
Abes M
中科院分区：
文献类型：
--
作者：
Abes M
使用的表面，界面和元素的特异性的X射线共振磁散射结合X射线磁性圆二色性，我们已经在空间上解决了磁自旋极化，和相关的界面邻近效应，在锰基高磁化率材料接近铁磁Co层。我们测量了~层厚不同的多层样品中顺磁性CuMn合金层中Mn和电子的磁极化。Mn的尺寸和边缘二向色性表明，随着铜厚度的增加，Mn诱导的极化降低，表明Cu和Mn自旋极化的主导界面性质。Mn的极化远高于Cu。显然，Mn矩是局域自旋密度的有用探针。Mn原子似乎与Co层反铁磁耦合在下面，铁磁耦合在上面。与此相反，界面铜原子保持铁磁性对齐的Co层的所有厚度的研究。
Using the surface, interface, and element specificity of x-ray resonant magnetic scattering in combination with x-ray magnetic circular dichroism, we have spatially resolved the magnetic spin polarization, and the associated interface proximity effect, in a Mn-based high-susceptibility material close to a ferromagnetic Co layer. We have measured the magnetic polarization of Mn andelectrons in paramagnetic CuMn alloy layers inmultilayer samples with varying copper layer thicknesses fromto. The size of the Mn andedge dichroism shows a decrease in the Mn-induced polarization for increasing copper thickness indicating the dominant interfacial nature of the Cu and Mn spin polarization. The Mn polarization is much higher than that of Cu. Evidently, the Mn moment is a useful probe of the local spin density. Mn atoms appear to be coupled antiferromagnetically with the Co layer belowand ferromagnetically coupled above. In contrast, the interfacial Cu atoms remain ferromagnetically aligned to the Co layer for all thicknesses studied.