Regensburg 2010 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 45: Electronic structure I

O 45.2: Vortrag

Mittwoch, 24. März 2010, 10:45–11:00, H33

Valence band photoemission Ni_xPd_1−x alloy films on Cu₃Au(100) — •Matthias Gulik^1,2, Lukasz Plucinski¹, and Claus M. Schneider¹ — ¹Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße, 52428 Jülich, Germany — ²Technische Universität Dortmund, Maria-Goeppert-Mayer- Str. 2, D-44221 Dortmund, Germany

Spin and angle-resolved photoemission are important experimental methods to investigate the electronic band structure of crystalline materials. Spin-integrated measurements can be performed relatively fast with a high energy and momentum resolution, whereas spin-resolved measurements reveal further information about the band structure.

On the compound of Ni_xPd_1−x/Cu₃Au(100) we will investigate the electronic and magnetic properties with regard to the thickness and the composition of the ultrathin Ni_xPd_1−x layer. The composition differences should be reflected in an inverse spin-reorientation transition. Furthermore we will compare the measured spectra to the theoretical calculations of the band structure.

The measurement takes place at Beamline 5 at DELTA, Dortmund, with an unique detector setup. We can acquire 2-dimensional angle resolved data for band mapping and spin resolved one-dimensional data quasi-simultaneously. This will provide us with high resolution band structure spectra and images as well as spin resolved valence band spectra. Our samples are prepared in-situ by e-beam evaporation and characterized by LEED and Auger spectroscopy.