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Phys. Rev. Lett. 89, 057201 (2002) [4 pages]

Size-Dependent Magnetism of Deposited Small Iron Clusters Studied by X-Ray Magnetic Circular Dichroism

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J.  T. Lau, A. Föhlisch, R. Nietubyc̀, M. Reif, and W. Wurth *
Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, D-22761 Hamburg, Germany

Received 27 September 2001; published 15 July 2002

The size-dependent magnetic properties of small iron clusters deposited on ultrathin nickel films have been studied with circularly polarized synchrotron radiation. With the use of sum rules, orbital and spin magnetic moments have been extracted from x-ray magnetic circular dichroism spectra. The ratio of orbital to spin magnetic moments varies considerably with cluster size, reflecting the dependence of magnetic properties on cluster size and geometry. These variations can be explained in terms of enhanced orbital moments in small clusters.


©2002 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.89.057201
DOI: 10.1103/PhysRevLett.89.057201
PACS: 75.75.+a, 36.40.Cg, 61.46.+w, 87.64.Ni

* Email address: wilfried.wurth@desy.de

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