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

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arxiv 1702.03147 v1 pith:TWL5N4PM submitted 2017-02-10 cond-mat.mes-hall

P. Wadley , K.W. Edmonds , M.R. Shahedkhah , R.P. Campion , B.L. Gallagher , J. Zelezny , J. Kunes , V. Novak
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T. Jungwirth V. Saidl P. Nemec F. Maccherozzi S. S. Dhesi
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classification cond-mat.mes-hall
keywords cumnasmagneticcouplingdichroismexchangelayerlinearmagnetization
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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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