Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 16: Poster I
MA 16.84: Poster
Dienstag, 12. März 2013, 10:30–13:30, Poster D
Probing the local magnetic properties of [Mn6IIICrIII]3+ deposited on surfaces by SPES and XMCD — •Andreas Helmstedt1, Aaron Gryzia1, Niklas Dohmeier1, Norbert Müller1, Armin Brechling1, Ulrich Heinzmann1, Veronika Hoeke2, Erich Krickemeyer2, Thorsten Glaser2, Mikhail Fonin3, Samuel Bouvron3, Philipp Leicht3, Thomas Tietze4, Eberhard Goering4, and Karsten Kuepper5 — 1Faculty of Physics, Bielefeld University — 2Faculty of Chemistry, Bielefeld University — 3Department of Physics, University of Konstanz — 4Max-Planck-Institut für Intelligente Systeme, Stuttgart — 5Department of Physics, University of Osnabrueck
Comprehensive studies of the [Mn6IIICrIII]3+ single-molecule magnet deposited on Au and Si substrates by Spin-Resolved Electron Spectroscopy (SPES) and X-ray Magnetic Circular Dichroism (XMCD) are presented. [Mn6IIICrIII]3+ consists of two bowl-shaped Mn3-triplesalen units linked by a hexacyanochromate. It exhibits a spin ground state of ST=21/2. For excitation energies covering the Mn-L2,3 region, the spin polarization of Auger electrons originating from the MnIII ions in [Mn6IIICrIII]3+ has been measured at room temperature and without applying external magnetic fields. Radiation damage was monitored by XAS at the Mn-L3 edge. Corresponding XMCD data have been obtained at 2K and 7T. The local magnetic properties of the Mn constituents in [Mn6IIICrIII]3+ SMM derived from spin polarization data in the paramagnetic phase are compared to results obtained by XMCD. Differences between both methods are discussed.