Direct measurement of depth-dependent Fe spin structure during magnetization reversal in Fe/ MnF<inf>2</inf> exchange-coupled bilayers

W. A.A. Macedo, B. Sahoo, J. Eisenmenger, M. D. Martins, W. Keune, V. Kuncser, R. Röhlsberger, O. Leupold, R. Rüffer, J. Nogués, Kai Liu, K. Schlage, Ivan K. Schuller

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21 Citations (Scopus)

Abstract

We measured directly the depth-dependent Fe spin rotation upon magnetization reversal in exchange-coupled Fe/ MnF2 bilayers using nuclear resonant scattering of synchrotron radiation from an 57Fe-probe layer buried at different depths within the Fe film. Our results show that the exchange-biased ferromagnetic layer develops a noncollinear spin structure along the film normal direction, reminiscent of a partial domain wall parallel to the Fe/ MnF2 interface. This is contrary to most theoretical models of exchange bias which assume a collinear spin structure in the ferromagnetic layer. © 2008 The American Physical Society.
Original languageEnglish
Article number224401
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume78
Issue number22
DOIs
Publication statusPublished - 1 Dec 2008

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