Berlin 2015 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 44: Surface Magnetism (Joint Session with O) - Adatoms on surfaces
MA 44.3: Vortrag
Donnerstag, 19. März 2015, 15:30–15:45, H 0110
Magnetic linear dichroism of 3d metal thin films — •Torsten Veltum1, Tobias Löffler1, Mathias Gehlmann2, Sven Döring2, Lukasz Plucinski2, Stephan Borek3, Jan Minar3, Jürgen Braun3, Hubert Ebert3, and Mathias Getzlaff1 — 1Institut für Angewandte Physik, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf — 2Peter Grünberg Institut PGI-6, Forschungszentrum Jülich, 52428 Jülich — 3Department Chemie, Ludwig-Maximilians-Universität München, 81377 München
Magnetic linear dichroism in the angular distribution of photoelectrons (MLDAD) is a technique that allows the study of both the electronic band structure and the magnetic properties of thin films and single crystals. We are looking for a deeper understanding of the magnetic linear dichroism of 3d metals. We study epitaxially grown Co(0001) and Fe(110) thin films on a W(110) surface.
In this study linearly polarized synchrotron radiation (Beamline 5, DELTA Dortmund) in the VUV regime is used to gain experimental data. Theoretical calculations for these systems are carried out with local spin density approximation (LSDA) and dynamical mean field theory (DMFT).
The electronic structure of the valence band is measured by variation of the photon energy. At excitation energies above 20 eV, dichroism measurements are reconfirmed and extended to angle-resolved spectra in off-normal geometry. The resonance between the 3d core-levels and the valence band of these materials shows an influence on the dichroism.