Origin of complex exchange anisotropy in Fe/MnF2 bilayers

I. N. Krivorotov, C. Leighton, J. Nogués, Ivan K. Schuller, E. Dan Dahlberg

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An analytical model of exchange anisotropy in epitaxial ferromagnetic/antiferromagnetic bilayers was developed. The model demonstrates that the high symmetry exchange anisotropy terms in ferromagnetic/antiferromagnetic bilayers originate from a partial domain wall in the antiferromagnetic layer. Application of the model to the experimental data analysis enables one to separately determine the fraction of uncompensated interfacial spins in the antiferromagnetic layer and the interfacial exchange coupling energy between spins in the ferromagnet and in the antiferromagnet. The model provides a quantitative description of complex exchange anisotropy recently observed in Fe/MnF2 bilayers.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number5
StatePublished - Aug 5 2003


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