Imaging the magnetic spin structure of exchange-coupled thin films.
We have investigated the magnetic spin structure of a soft-magnetic film that is exchange-coupled to a hard-magnetic layer to form an exchange-spring layer system. The depth dependence of the magnetization direction was determined by nuclear resonant scattering of synchrotron radiation from ultrathin 57Fe probe layers. In an external field a magnetic spiral structure forms that can be described within a one-dimensional micromagnetical model. The experimental method allows one to image vertical spin structures in stratified media with unprecedented accuracy.
Röhlsberger
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Fachbereich Physik, Universität Rostock, August-Bebel-Strasse 55, 18055 Rostock, Germany. roehle@physik1.uni-rostock.de
Thomas
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Schlage
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Burkel
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Leupold
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Rüffer
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