Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 50: Poster II
MA 50.22: Poster
Freitag, 15. März 2013, 10:30–13:30, Poster D
Correlations between the surface morphology and the atomic structure of thin layers of Fe3Si on GaAs(001) and their magnetic properties — •Sani Noor1, Igor Barsukov2, M. Samet Özkan1, Lina Elbers1, Benjamin Geisler2, Peter Kratzer2, Michael Farle2, and Ulrich Köhler1 — 1Experimentalphysik IV, AG Oberflächen, Ruhr-Universität Bochum — 2Fakultät für Physik and Center for Nanointegration (CeNIDE) Universität Duisburg-Essen
Among the FM/SC combinations that represent one possible approach necessary for the realization of spintronic devices Fe3Si/GaAs is an interesting choice due to its properties like a low lattice mismatch, half-metallic behaviour and high thermal stability.
In this contribution we consider the structural and magnetic properties of thin near-stoichiometric Fe3Si layers on GaAs(001) with varying thicknesses. Methods employed include STM, LEED, in situ MOKE, SQUID magnetometry and FMR. Emphasis is laid on the correlations between these properties such the nucleation at low coverage and its superparamagnetic behaviour and the layer morphology at higher coverage and magnetic anisotropies. Furthermore, atomic scale STM data is compared with STM simulations.