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Uncompensated spins in a micro-patterned CoFeB/MnIr exchange bias system

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8 Author(s)
Eimuller, T. ; Max-Planck-Institut für Metallforschung, Heisenbergstrasse 3, D-70569 Stuttgart, Germany ; Kato, T. ; Mizuno, T. ; Tsunashima, S.
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The element specific domain configuration of a microstructured Co86Fe10B4/Mn77Ir23/Ni80Fe20/Si3N4 exchange bias film was studied by photoemission electron microscopy using x-ray magnetic circular dichroism. In the dots the magnetization shows less preferred orientation along the exchange bias direction than in unstructured areas. Uncompensated Mn spins at the CoFeB/MnIr interface with an antiferromagnetic coupling between the Mn and the Co magnetic moments could be studied by imaging and spectromicroscopy.

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Applied Physics Letters  (Volume:85 ,  Issue: 12 )