Hannover 2013 – scientific programme
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MO: Fachverband Molekülphysik
MO 24: Atomic clusters II (with A)
MO 24.3: Talk
Thursday, March 21, 2013, 14:45–15:00, F 428
Spin Coupling and Orbital Angular Momentum Quenching in Free Iron, Cobalt, and Nickel Clusters — Andreas Langenberg1,2, Konstantin Hirsch1,2, Arkadiusz Ławicki1, Vicente Zamudio-Bayer1,2, Markus Niemeyer1,2, Patrick Chmiela1,2, Bruno Langbehn1,2, Akira Terasaki3,4, Thomas Möller2, Bernd von Issendorff5, and •Tobias Lau1 — 1Institut für Methoden und Instrumentierung der Forschung mit Synchrotronstrahlung, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin — 2Institut für Optik und Atomare Physik, Technische Universität Berlin, 10623 Berlin — 3Cluster Research Laboratory, Toyota Technological Institute, Chiba, Japan — 4Department of Chemistry, Kyushu University, Fukuoka, Japan — 5Fakultät für Physik, Universität Freiburg, 79104 Freiburg
The peculiar magnetic behavior of the cationic thirteen iron atom icosahedron [1] is investigated in a comparative x-ray magnetic circular dichroism study of size-selected free iron, cobalt, and nickel clusters in the size range of 10–15 atoms per cluster. While the magnetic spin moment of cationic Fe13+ is quenched significantly, no such quenching was observed for Co13+ or Ni13+. This can most likely be correlated to the high symmetry in the case of iron.
M. Niemeyer et al., Phys. Rev. Lett. 108, 057201 (2012).