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Regensburg 2002 – scientific programme

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DS: Dünne Schichten

DS 27: Postersitzung

DS 27.42: Poster

Tuesday, March 12, 2002, 15:30–17:30, Poster Physik B

Structure properties of [Fe/Pt]n/MgO(001) superlattices — •Johannes Grabis1, Alexei Nefedov1, Hartmut Zabel1, Elen Schuster2, and Werner Keune21Institut für Experimentalphysik/Festkörperphysik, Ruhr-Universität Bochum, 44780 Bochum — 2Laboratorium für Angewandte Physik, Gerhard-Mercator Universität Duisburg, 47048 Duisburg

Perpendicularly magnetized thin films and superlattices are very interesting for many applications. But for good magnetic properties such systems must have a good structural quality. In order to find the best growth conditions [Fe(1ML)/Pt(1ML)]n superlattices were epitaxially grown by MBE on MgO (001) at different growth temperatures and then they were characterized by out-of-plane and in-plane X-ray diffraction. The measurements were performed using double-axis diffractometer based on rotating-anode generator and on beamline W1.1 at HASYLAB. For superlattice grown at 550oC the L10-type structure was determined with lattice parameters a=b=3.885Å and c=3.71Å. The order parameter S was calculated from integrated intensities of Bragg peaks and for the superlattice with the highest structural quality we obtain an order parameter of S=0.58. It was found that the structural quality drastically increases with rising growth temperature. This work is supported by DFG and SFB 491.

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