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Uncompensated moments in the MnPd/Fe exchange bias system

The element-specific magnetic structure of an epitaxially grown Mn_52Pd_48/Fe bilayer showing exchange bias was investigated with atomic-layer depth sensitivity at the antiferromagnet/ferromagnet interface by soft-x-ray magnetic circular dichroism and magnetic reflectivity. A complex magnetic interf...

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Bibliographic Details
Published in:Physical review letters 2008-09, Vol.101 (12), p.126402-126402, Article 126402
Main Authors: Brück, Sebastian, Schütz, Gisela, Goering, Eberhard, Ji, Xiaosong, Krishnan, Kannan M
Format: Article
Language:English
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Summary:The element-specific magnetic structure of an epitaxially grown Mn_52Pd_48/Fe bilayer showing exchange bias was investigated with atomic-layer depth sensitivity at the antiferromagnet/ferromagnet interface by soft-x-ray magnetic circular dichroism and magnetic reflectivity. A complex magnetic interfacial configuration, consisting of a 2-monolayer-thick induced ferromagnetic region, and pinned uncompensated Mn moments that reach far deeper (approximately 13 A), both in the antiferromagnet, were found. For the latter, a direct relationship with the magnitude of the exchange bias is verified by similar measurements perpendicular to the field cooling direction.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.101.126402