Dresden 2006 – scientific programme
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MA: Magnetismus
MA 24: Magnetic Thin Films III
MA 24.8: Talk
Thursday, March 30, 2006, 12:00–12:15, HSZ 03
Influence of the antiphase grain structure on the domain configuration of Fe3O4 thin films — •Jiandong Wei1, Ivo Knittel1, Yang Zhou2, Shane Murphy2, Igor Shvets2, and Uwe Hartmann1 — 1Department of Experimental Physics,University of Saarbrücken — 2SFI Nanoscience Laboratory,School of Physics,Trinity College
A long-range ordered magnetic domain structure was found for the first time in magnetite (Fe3O4) thin films prepared by molecular beam epitaxy on MgO (100) substrates. The stripe-like magnetic domain structure arising after suitable postprocessing differs significantly from earlier observations. The field-dependent domain structure was investigated by magnetic force microscopy equipped with an in-situ magnetic field. The results cannot be explained by the standard theory of stripe domains based on mean-field magnetic parameters. The domain structure is determined by immobile pinning centers arising from the magnetite anti-phase grain structure.