Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 4: Surface Magnetism: Atoms and Molecules
O 4.8: Vortrag
Montag, 7. März 2016, 12:15–12:30, S052
X-ray magnetic dichroism of small, size-selected FeV clusters on Cu(100) — •Fridtjof Kielgast1, Torben Beeck1, Ivan Baev1, Deniza Chekrygina1, Michael Martins1, and Wilfried Wurth1,2 — 1Physics Department, University of Hamburg — 2DESY Photon Science, Hamburg
The electronic and magnetic properties of clusters tend to change strongly depending on size and composition of the clusters. This change is of great interest both in fundamental and applied research. Here we investigate clusters of 3d metal alloys produced by high energy sputtering. A magnetic field is used to separate the clusters depending on their mass-to-charge ratio. Pure Fe and V adatoms, Fe2,3 and V2 as well as V1Fe1 clusters, deposited onto a Cu(100) surface were studied using XMCD. The magnetic XMCD signal was obtained by switching an external magnetic field (±7 T) and scanning the L2,3 edges with circular polarized light at the P04 beamline at PETRA III, DESY. To avoid fragmentation or implantation of the clusters into the substrate, the deposition was carried out by using a soft landing scheme. This work is supported by the DFG in the framework of the SFB 668.