Regensburg 2013 – scientific programme
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MA: Fachverband Magnetismus
MA 16: Poster I
MA 16.85: Poster
Tuesday, March 12, 2013, 10:30–13:30, Poster D
Investigation of [Fe6IIICrIII]3+ Molecules Deposited on Surfaces by XAS, SPES and XMCD — •Niklas Dohmeier1, Andreas Helmstedt1, Aaron Gryzia1, Norbert Müller1, Armin Brechling1, Ulrich Heinzmann1, Veronika Hoeke2, Erich Krickemeyer2, Thorsten Glaser2, and Karsten Küpper3 — 1Faculty of Physics, Bielefeld University — 2Faculty of Chemistry, Bielefeld University — 3Department of Physics, University of Osnabrueck
[Fe6IIICrIII]3+ is a heptanuclear metal-organic coordination compound containing six FeIII ions and one CrIII embedded in an organic environment. An airbrush-based preparation method leads to large homogeneous samples. X-ray absorption spectroscopy (XAS) was used to monitor the sample oxidation state and its reduction during the performed spin-resolved photoemission measurements (SPES). The spin polarization of the Auger electrons following the excitation with circularly polarized synchrotron light in the region of the Fe-L2,3 absorption edge is measured to reveal information about the magnetic properties of [Fe6IIICrIII]3+. The results were compared to corresponding X-ray magnetic circular dichroism (XMCD) measurements performed at 4 K and 6.9 T. Sum rules are applied to both data sets. SPES and XMCD data for the reference material Fe2O3 are presented as well.