Dresden 2009 – wissenschaftliches Programm
DS 16.30: Poster
Dienstag, 24. März 2009, 09:30–12:30, P5
Combined MOKE and (GI)XRD studies on non-epitaxial and epitaxial thin magnetic films — •Timo Kuschel1, Tobias Becker1, Hauke Bardenhagen1, Oliver Hoefert1, Martin Suendorf1, Bernd Zimmermann1, Florian Bertram1, Daniel Bruns1, Michael Paulus2, Christian Sternemann2, Lars Boewer2, and Joachim Wollschlaeger1 — 1Fachbereich Physik, Universität Osnabrück, Barbarastr. 7, 49069 Osnabrueck, Germany — 2DELTA, Universität Dortmund, Maria-Goeppert-Mayer-Str. 2, 44227 Dortmund, Germany
The behaviour of thin magnetic films concerning the magnetization is important for spintronic applications. Therefore MOKE measurements as well as (GI)XRD experiments were performed on non-epitaxial and epitaxial thin magnetic films.
We investigated an uniaxial magnetic anisotropy of amorphous as well as polycrystalline Co films grown on glass (SiO2). As a result from our research we can exclude growth conditions and strain of the substrate as an origin of this anisotropy. Also the atomic structure of the Co films can not be the reason for the magnetic anisotropy. The structure depends on the film thickness, because thinner Co films grow amorphous and thicker Co films grow polycrystalline.
In contrast to this we analyzed the magnetic behaviour of epitaxial Fe on MgO(001). The MOKE measurements verify a fourfold magnetic anisotropy concerning the cubic crystal structure. Untypical hysteresises in some directions point to an out-of-plane magnetization during the reversal process.