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arXiv 1702.03147cond-mat.mes-hall
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双层Fe/CuMnAs薄膜中反铁磁自旋轴取向的控制

Control of antiferromagnetic spin axis orientation in bilayer Fe/CuMnAs films

P. Wadley, K. W. Edmonds, M. R. Shahedkhah, R. P. Campion, B. L. Gallagher, J. Zelezny, J. Kunes, V. Novak, T. Jungwirth, V. Saidl, P. Nemec, F. Maccherozzi, S. S. Dhesi

摘要:

使用X射线磁性圆二色性和线性二色性技术,我们证明了共线的交换耦合之间的外延反铁磁体,tetraxylCuMnAs,和Fe表面层。一个小的未补偿的Mn磁矩被观察到,这是反平行于Fe的磁化。由于层间交换耦合,5nm厚的CuMnAs层的交错磁化在小磁场下是可旋转的。这使我们能够获得不同的结晶取向的CuMnAs在(001)平面的X射线磁性线性二向色谱。

英文摘要:

Using x-ray magnetic circular and linear dichroism techniques, we demonstrate a collinear exchange coupling between an epitaxial antiferromagnet, tetragonal CuMnAs, and an Fe surface layer. A small uncompensated Mn magnetic moment is observed which is antiparallel to the Fe magnetization. The staggered magnetization of the 5nm thick CuMnAs layer is rotatable under small magnetic fields, due to the interlayer exchange coupling. This allows us to obtain the x-ray magnetic linear dichroism spectra for different crystalline orientations of CuMnAs in the (001) plane.

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