Berlin 2012 – scientific programme
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MA: Fachverband Magnetismus
MA 8: Magnetic Particles / Clusters I
MA 8.1: Talk
Monday, March 26, 2012, 17:45–18:00, EB 202
X-ray magnetic circular dichroism of size-selected CoRh clusters — •Torben Beeck1, Ivan Baev1, Kai Chen2, Michael Martins1, and Wilfried Wurth1 — 1Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg — 2Institut für Werkstoffforschung, Max-Planck-Straße 1, 21502 Geesthacht
At the UE52 SGM beamline at BESSY II we investigated mass-selected CoxRhy clusters with up to four atoms per cluster. The clusters were deposited in situ via soft landing on a remanently magnetized Ni/Cu(100) surface and probed with left and right circular polarized light at the Co L2,3 edges. The magnetic response varying with different Co/Rh compositions showing none, weak or strong dichroism. For Co1Rh2 it appears that the coupling to the substrate is changed to antiferromagnetic. Because of the rapid changes in dichroism and the small atomic numbers these type of clusters are suitable for comparison with complex theoretical calculations.
This work is supported by the DFG in the framework of the SFB 668 subproject A7.