Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 19: Poster I

MA 19.14: Poster

Dienstag, 1. April 2014, 13:00–15:30, P1

Magnetic linear dichroism in angular resolved photoemission of the valence band of Co (0001) thin films — •Tobias Löffler¹, Torsten Veltum¹, 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

The Magnetic linear dichroism in the angular distribution (MLDAD) of photoelectrons technique allows the study of the magnetic band structure as well as the magnetic properties of metallic thin films and single crystals. We are interested in a deeper understanding of the magnetic linear dichroism of ferromagnetic 3d metals. Special attention is turned to the question, which parts of the band structure are responsible for this phenomenon. In this study, linearly polarized synchrotron radiation in the VUV regime is used (Beamline 5, DELTA Dortmund). The system under study consists of a thin hcp Co (0001) film which was epitaxially grown on a W(110) surface.

To investigate the electronic structure of the valence band, the exiting photon energy is varied. At lower energies, existing dichroism measurements are confirmed [1] and extended to off-normal geometry. The angle-resolved measurements show a strong angle-dependence of the dichroism. Opposite effects for negative and positive detection angles have been observed and will be discussed

[1] J. Bansmann et al., Surf. Sci. 454-456 (2000), 686-691