Berlin 2005 – scientific programme
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MA: Magnetismus
MA 20: Poster:Schichten(1-29),Spintrsp(30-45),Ex-Bias(46-63),Spindyn(64-75),Mikromat.(76-80),Cluster(81-94),Abbv.(95-99),Obflm(100-02),SpElek.(103-09),E-Theo(110-14),Mikromag.(115-16),Spin+PÜ(117-26),Mag.Mat.(127-51),Meth.(152-55),Mol.Mag(156-59),Kondo(160-65
MA 20.25: Poster
Monday, March 7, 2005, 14:00–18:00, Poster TU C
Magnetic domain structures in Fe3O4 thin films studied by magnetic force microscopy (MFM) — •Jiandong Wei1, Michael Koblischka1, Uwe Hartmann1, Yang Zhou2, Shane Muphy2, and I.V. Shvets2 — 1Experimental Physics Department, University of Saarbruecken, Saarbruecken, Germany — 2SFI Nanoscience Laboratory, Trinity College Dublin, Dublin 2, Ireland
Epitaxial Fe3O4 thin films of various thicknesses and thermo-chemical treatments have been studied by MFM. The subtle magnetic domain structures and their changes with varying preparation processes were clearly revealed, which is a basis for the understanding of the anomalous magnetic behavior caused by antiphase boundaries in the films. The film thickness and the temperature, atmosphere and duration of the annealing procedure are important factors to determine the final magnetic properties of the films. Particularly, the annealing time for epitaxial thin films has a significant influence on the formation of micromagnetic structures. The influence of external magnetic fields up to 50mT on the magnetic domain structures was also investigated by MFM. This work is supported by EU project of ASPRINT.