Journal
JOURNAL OF APPLIED PHYSICS
Volume 95, Issue 10, Pages 5324-5329Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1697640
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The influence of second-order magneto-optic effects on Kerr effect magnetometry of epitaxial exchange coupled Fe50Mn50/Ni81Fe19-bilayers is investigated. A procedure for separation of the first-and second-order contributions is presented. The full angular dependence of both contributions during the magnetization reversal is extracted from the experimental data and presented using gray scaled magnetization reversal diagrams. The theoretical description of the investigated system is based on an extended Stoner-Wohlfarth model, which includes an induced unidirectional and fourfold anisotropy in the ferromagnet, caused by the coupling to the antiferromagnet. The agreement between the experimental data and the theoretical model for both the first- and second-order contributions are good, although a coherent reversal of the magnetization is assumed in the model. (C) 2004 American Institute of Physics.
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