Berlin 2008 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 12: Symposium: Size-Selected Clusters at Surfaces I
(Invited Speakers: Karl-Heinz Meiwes-Broer, Heinz Hövel, Thorsten Bernhardt)

O 12.9: Vortrag

Montag, 25. Februar 2008, 16:30–16:45, MA 005

Structure and properties of deposited size selected Fe₅₀Co₅₀ alloy clusters — •Wolfgang Rosellen, Furkan Bulut, Renate Kerstin Gebhardt, and Mathias Getzlaff — Institut für Angewandte Physik, Universitätsstr.1 D-40225 Düsseldorf

Size-selected Fe₅₀Co₅₀ alloy cluster were generated by a continuously working Arc Cluster Ion Source (ACIS). The selection is carried out by means of an electrostatic quadrupole. The typical size of the clusters is between 6-12nm. The lateral size distribution and the crystalline properties were investigate ex-situ by means of High Resolution Transmissions Electron Microscopy (HRTEM). The alloy clusters were deposited on a tungsten W(110) surface under UHV condition in order to avoid oxidation. The distribution of height and size were determined by scannning tunnelling microsopy (STM) experiments for different sizes of the incoming particles and several deposition angles with respect to the W(110) surface. Additionally, the structural properties of individual Fe₅₀Co₅₀ clusters were examined.

• 1 M. Getzlaff et al., Appl. Phys. A 82 (2006) 95
• 2 K. Gebhardt et al., Eur. Phys. J. D (submitted)