DPG Phi
Verhandlungen
Verhandlungen
DPG

Stuttgart 2012 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

MO: Fachverband Molekülphysik

MO 20: Atomic clusters (with A)

MO 20.6: Talk

Thursday, March 15, 2012, 15:45–16:00, V57.05

Spin Coupling and Orbital Momentum Quenching in Small Iron and Cobalt Clusters — •Andreas Langenberg1,2, Konstantin Hirsch1,2, Vicente Zamudio-Bayer1,2, Markus Niemeyer1,2, Arkadiusz Lawicki2, Marlene Vogel2, Kazuhiro Egashira3, Thomas Möller2, Akira Terasaki3, Bernd von Issendorff4, and Tobias Lau11Helmholtz-Zentrum Berlin für Materialien und Energie, Albert Einstein Str. 15, 12489 Berlin — 2Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin — 3Cluster Research Laboratory, Toyota Technological Institute, Ichikawa 272-0001, Japan — 4Universität Freiburg, Fakultät für Physik, 79104 Freiburg, Germany

X-ray magnetic circular dichroism (XMCD) spectroscopy was performed on free and size selected iron and cobalt clusters in a linear penning trap giving direct access to spin and orbital resolved magnetic moments (ms, ml). For iron clusters a quenching of the orbital magnetic moments for already very small clustersizes and an antiferromagnetic coupling of Fe13+ [1] can be observed. Moreover the measured total magnetic moments of the clusters (mj=ml+ms) are in good agreement with results from Stern-Gerlach experiments [2,3]. High resolution XMCD spectra as well as magnetization curves of cobalt and iron clusters will be discussed in detail.

[1] P. Bobadova-Parvanova, K. A. Jackson et.al., Phys. Rev. B 66, 195402 (2002)

[2] X. Xu, S. Yin et.al., Phys. Rev. Lett. 95, 237209 (2005)

[3] M. Knickelbein, Chem. Phys. Lett. 353, 221-225 (2002)

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2012 > Stuttgart