Hannover 2013 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
A: Fachverband Atomphysik
A 4: Cluster (with MO)
A 4.5: Talk
Monday, March 18, 2013, 12:00–12:15, F 102
Coordination-driven magnetic-to-nonmagnetic transition in manganese doped silicon clusters — Vicente Zamudio-Bayer1,2, Linn Leppert3, Konstantin Hirsch1,2, Andreas Langenberg1,2, Jochen Rittmann1,2, Martin Kossick1,2, Robert Richter2, Akira Terasaki4,5, Thomas Möller2, Bernd von Issendorff6, Stefan Kümmel3, 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 — 3Theoretische Physik IV, Universität Bayreuth, 95440 Bayreuth — 4Cluster Research Laboratory, Toyota Technological Institute, Chiba, Japan — 5Department of Chemistry, Kyushu University, Fukuoka, Japan — 6Fakultät für Physik, Universität Freiburg, 79104 Freiburg
X-ray Magnetic Circular Dichroism (XMCD) spectroscopy allows to obtain fundamental insight into magnetic properties of free, size-selected clusters. Using a combination of XMCD and non-empirical density functional theory, we demonstrate that the magnetic moment of MnSin+ is completely quenched as soon as a cluster size of n = 10 is exceeded. This is the result of a structural transition with an abrupt increase of the impurity coordination, which takes place between MnSi10+ and MnSi11+ and is accompanied by marked changes in the local electronic structure of the manganese impurity.