Dresden 2009 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 26: Poster II
DS 26.39: Poster
Mittwoch, 25. März 2009, 09:30–12:30, P5
GIXRD and XRD studies on epitaxial magnetite ultra thin films on MgO(001) — •Florian Bertram1, Oliver Hoefert1, Martin Suendorf1, Bernd Zimmermann1, Carsten Deiter2, Daniel Bruns1, Timo Kuschel1, Lars Boewer3, Christian Sternemann3, Michael Paulus3, and Joachim Wollschlaeger1 — 1Fachbereich Physik, Universität Osnabrück, Barbarastr. 7, D-49069 Osnabrück, Germany — 2HASYLAB at DESY, Notkestr. 85, D-22607 Hamburg, Germany — 3DELTA, Universität Dortmund, Maria-Goeppert-Mayer-Str. 2, D-44227 Dortmund, Germany
In recent years there is an increase in interest for ultra thin magnetic films. Magnetite films are promising candidates for room temperature spintronic devices, because magnetite is a semi-metallic material with full spin polarization on the Fermi level EF. For such applications it is necessary to produce films of high crystal quality. MgO(001) is a good candidate as a substrate, due to the small lattice mismatch (0.31%). The samples were grown under UHV conditions and have been pre-characterized in situ by LEED and XPS.
Here we present the structure analysis of magnetite films on MgO(001) by kinematic diffraction theory to characterize the tetragonal distortion and relaxations of the magnetite films.
The GIXRD measurements were performed at HASYLAB/DESY at beamline BW 2 and at DELTA at beamline BL 9. The XRD measurements were carried out at HASYLAB/DESY at beamline W 1.