Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 43: Magnetization Dynamics III

MA 43.11: Vortrag

Donnerstag, 3. April 2014, 17:45–18:00, HSZ 401

Magnetic linear dichroism in resonant photoemission of Co thin films — •Torsten Veltum¹, Tobias Löffler¹, Sven Döring², Lukasz Plucinski², and Mathias Getzlaff¹ — ¹Institut für Angewandte Physik, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf — ²Peter Grünberg Institut PGI-6, Forschungszentrum Jülich, 52428 Jülich

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, specifically which parts of the band structure are responsible for this phenomenon. In this study linearly polarized synchrotron radiation (Beamline 5, DELTA Dortmund) in the VUV regime is used. The studied system is an epitaxially grown hcp(0001) Co thin film on a W(110) surface.
The electronic structure of the valence band is measured by variation of the photon energy. At lower energies, dichroism measurements are confirmed [1] and extended to angle-resolved spectra in off-normal geometry. These angle-resolved measurements present opposite effects for positive and negative detection angles. At 60 eV photon energy we observe a resonance between the Co 3p and the valence band which influences the dichroism.
[1] J. Bansmann et al., Surf. Sci. 454-456 (2000), 686-691