Dresden 2009 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 16: Poster I

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.