https://doi.org/10.1140/epjd/e2007-00238-x
Temperature dependent magnetic spin and orbital moments of mass-filtered cobalt clusters on Au(111)
1
Institut für Oberflächenchemie und Katalyse, Universität Ulm, Albert-Einstein-Allee 47, 89069 Ulm, Germany
2
Institut für Physik, Universität Rostock, Universitätsplatz 3, 18051 Rostock, Germany
3
Institut für Angewandte Physik, Universität Düsseldorf, Universitätsstrasse 1, 40225 Düsseldorf, Germany
4
Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
5
Institut de Physique et de Chimie des Matériaux de Strasbourg, UMR 7504 CNRS-Université Louis Pasteur, BP 43, 23 rue de Loess, 67034 Strasbourg Cedex 2, France
Corresponding authors: a joachim.bansmann@uni-ulm.de - b armin.kleibert@physik.uni-rostock.de
Received:
23
February
2007
Revised:
22
June
2007
Published online:
20
July
2007
Mass-filtered cobalt clusters with a size of 8 nm have been deposited in-situ under soft-landing conditions onto Au(111). The spin and orbital moments of the Co nanoparticles on a Au (111) single crystal have been investigated as a function of the temperature using the element-specific method of X-ray magnetic circular dichroism in photoabsorption. The results hint at an temperature-dependent spin-reorientation transition which is discussed with respect to different contribution to the magnetic anisotropy. Furthermore, by means of an in-situ oxidation experiment, the influence of an exposure to oxygen on the properties of the cobalt clusters has been investigated.
PACS: 73.22.-f – Electronic structure of nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals / 75.70.-i – Magnetic properties of thin films, surfaces, and interfaces / 75.75.+a – Magnetic properties of nanostructures / 81.07.-b – Nanoscale materials and structures: fabrication and characterization
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007
