Regensburg 2004 – scientific programme

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SYXM: X-RAY Magneto-Optics

SYXM 1: X-Ray Magneto-Optics

SYXM 1.6: Invited Talk

Tuesday, March 9, 2004, 17:00–17:30, H1

Magnetic properties of mass selected transition metal clusters — •Wilfried Wurth¹, Leif Glaser¹, Tobias Lau^1,2, Michael Martins¹, Robert Nietubyc¹, and Matthias Reif¹ — ¹Institut für Experimentalphysik, Universität Hamburg, Hamburg, Germany — ²EPFL, Lausanne, Switzerland

The magnetism of nanoparticles has attracted a lot of interest recently due to their promising properties for storage media. From a more fundamental point of view small clusters allow to study the transition from the magnetic properties of atoms to those of the respective solids.

We have developed a cluster source which enables us to investigate size selected transition metal clusters deposited on solid surfaces using x-ray magnetic circular dichroism. In this talk recent results for iron clusters [1,2] and chromium clusters deposited on ferromagnetic substrates will be presented which demonstrate the strong size dependence of the magnetic properties of the clusters.

[1] J.T. Lau, A. Föhlisch, R. Nietubyc, M. Reif, and W. Wurth, Phys. Rev. Lett. 89, 57202 (2002)

[2] J.T. Lau, A. Föhlisch, M. Martins, R. Nietubyc, M. Reif, and W. Wurth, New J. of Phys. 4, 98.1 (2002)