Physics – Condensed Matter
Scientific paper
2003-11-12
Physics
Condensed Matter
6 pages, 7 figures, submitted to J. Appl. Phys
Scientific paper
10.1063/1.1697640
The influence of second-order magneto-optic effects on Kerr effect magnetometry of epitaxial exchange coupled FeMn/NiFe-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.
Hillebrands Burkard
Mewes T.
Nembach H.
Rickart M.
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