Interface Magnetism of $\hbox{Au/Co/Cr}_{2}\hbox{O}_{3}(0001)$ Epitaxial Film With Perpendicular Magnetic Anisotropy and Perpendicular Exchange Bias
Interface Magnetism of $\hbox{Au/Co/Cr}_{2}\hbox{O}_{3}(0001)$ Epitaxial Film With Perpendicular Magnetic Anisotropy and Perpendicular Exchange Bias
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DOI：
10.1109/tmag.2010.2044372
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发表时间：
2010-06
影响因子：
2.1
通讯作者：
Y. Shiratsuchi;S. Kawahara;H. Noutomi;R. Nakatani
中科院分区：
文献类型：
--
作者：
Y. Shiratsuchi;S. Kawahara;H. Noutomi;R. Nakatani
本文研究了反铁磁Cr_2O_3（0001）薄膜上生长的Au覆盖的Cr_2Co薄膜的界面磁性。特别是，垂直磁各向异性和垂直交换偏置进行了研究。为了加强分析，还进行了结构调查。超薄Co膜同时表现出垂直磁各向异性和垂直交换偏置。磁各向异性主要是由Au覆盖层引起的。然而，Co/Cr2 O3界面通过Co自旋和Cr自旋的共线交换耦合也影响垂直磁各向异性。共线交换耦合引起垂直交换偏置。这是解释对齐Cr自旋方向由于外延生长和小的晶格失配。
We have investigated interface magnetism of Au-capped ultrathin Co film grown on antiferromagnetic Cr2O3(0001) thin film. In particular, perpendicular magnetic anisotropy and perpendicular exchange bias are investigated. To strengthen the analysis, structural investigations are also conducted. Ultrathin Co film shows both perpendicular magnetic anisotropy and perpendicular exchange bias. Perpendicular magnetic anisotropy is mainly caused by Au capping layer. However, Co/Cr2O3 interface also affects the perpendicular magnetic anisotropy through the collinear exchange coupling of Co spin and Cr spin. The collinear exchange coupling gives rise to the perpendicular exchange bias. This is explained by aligned Cr spin direction owing to epitaxial growth and small lattice misfit.