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Asymmetric magnetization reversal on exchange biased CoO/Co bilayers |
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| Authors: | F. Radu M. Etzkorn T. Schmitte R. Siebrecht A. Schreyer K. Westerholt H. Zabel |
| Affiliation: | a Institut für Experimentalphysik, Festkörperphysik, Ruhr-Universität Bochum, D 44780 Bochum, Germany b Departamentul de Fizica Experimentala, Institutul National de Fizica si Inginerie Nucleara, P.O. BOX MG-6, 76900, Magurele-Bucuresti, Romania c Institute Laue-Langevin, 38042, Grenoble cedex 9, France |
| Abstract: | We study magnetic hysteresis loops after field cooling of a CoO/Co bilayer by MOKE and polarized neutron reflectivity. The neutron scattering reveals that the first magnetization reversal after field cooling is dominated by domain wall movement, whereas all subsequent reversals proceed essentially by rotation of the magnetization. In addition, off-specular diffuse scattering indicates that the first magnetization reversal induces an irreversible change of the domain state in the antiferromagnet. |
| Keywords: | Exchange bias Magnetization reversal Neutron reflectivity |
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