Regensburg 2010 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 6: Magnetic Thin Films I (Heusler Alloys)
MA 6.15: Vortrag
Montag, 22. März 2010, 18:15–18:30, H10
Hard X-ray photoelectron spectroscopy studies of buried magnetic multilayers at PETRA III. — •Andrei Gloskovskii1, Gerhard H. Fecher1, Claudia Felser1, Sebastian Thiess2, Heiko Schulz-Ritter2, Wolfgang Drube2, Götz Berner3, Michael Sing3, and Ralph Claessen3 — 1Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg - University, Mainz — 2Hasylab/DESY, Hamburg — 3Experimental Physics 4, University of Würzburg, Würzburg
We report on the first hard X-Ray photoelectron spectroscopy (HAXPES) experiments at the undulator beamline P09 of the PETRA III storage ring, currently being commissioned at DESY in Hamburg. With the combination of high-flux undulator radiation from a brilliant third generation hard X-ray source and high-resolution electron spectrometers operating at high voltages (kinetic energies up to 15 keV) HAXPES becomes a powerful tool for the investigation of electronic and magnetic properties of bulk materials and buried layers. Here, the properties of several promising candidates for tunnel magnetoresistive devices were investigated. Pinned MnIr-CoFe thin film multilayers show large dichroism in the angular distribution (LMDAD). The LMDAD effect has a cos 2θ dependence, where θ is the angle between the projection of the light polarisation and the sample magnetisation direction. This gives direct information about the magnetisation direction with respect to the plane of incidence of the p-polarised synchrothron beam. This work is funded by BMBF (05KS7UM1)