Influence of interface exchange coupling in perpendicular anisotropy [Pt/Co]50/TbFe bilayers
Résumé
We present the magnetization evolution of perpendicular anisotropy TbFe and ͓Co/ Pt͔ 50 thin films either in direct contact resulting in antiferromagnetic interfacial coupling or separated by a thick decoupling Pt layer. Magnetometry and x-ray magnetic circular dichroism spectroscopy determine the spatially averaged magnetic properties. Resonant magnetic x-ray small-angle scattering and magnetic soft x-ray transmission microscopy probed the domain configurations and correlations in the reversal processes. While the Co/Pt multilayer reverses by domain propagation, the TbFe magnetization reversal was dominated either by coherent magnetiza-tion reversal processes or by lateral domain formation depending on the interface exchange coupling. In the presence of lateral domains, dipolar field induced domain replication phenomena were observed.
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