Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 41: Surface magnetism I

MA 41.2: Vortrag

Donnerstag, 15. März 2018, 09:45–10:00, EB 202

Magnetic linear dichroism of ferromagnetic 3d metal thin films — •Torsten Veltum¹, Tobias Löffler¹, Stefano Ponzoni², Mirko Cinchetti², and Mathias Getzlaff¹ — ¹Institut für Angewandte Physik, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf — ²Experimentelle Physik VI, Fakultät Physik, Technische Universität Dortmund, 44221 Dortmund

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. Because we are interested in a deeper understanding of the magnetic linear dichroism of 3d metals, we study epitaxially grown ferromagnetic 3d metal 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 the experimental data. At the beamline we have access to angle-resolved photoemission spectroscopy and low energy electron diffraction.

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 for iron and cobalt and extended to angle-resolved spectra in off-normal geometry. For iron and cobalt, the resonance between the 3d core-levels and the valence band of these materials shows an influence on the dichroism, whereas for nickel there is no influence.