Dresden 2014 – scientific programme

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O: Fachverband Oberflächenphysik

O 36: Posters: Bio/organic Molecules on Surfaces, Graphene, Solid/liquid interfaces, Metal Substrates, Electronic Structure Theory

O 36.82: Poster

Tuesday, April 1, 2014, 18:30–22:00, P1

magnetic properties of iron and cobalt nanostructures fabricated by focused electron induced processing — •Fan Tu, Martin Drost, Florian Vollnhals, Esther Carrasco, Andreas Späth, Hans-Peter Steinrück, and Hubertus Marbach — Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander Universität Erlangen-Nürnberg, Egerlandstr.3, D-91058, Erlangen, Germany

Thin film nanostructures have wide-spread potential applications. With our specific approach to focused electron beam induced processing (FEBIP), we are able to fabricate clean nanostructures on surfaces with full lithographic control from adsorbed precursor molecules. With metal-organic precursors such as iron pentacarbonyl (Fe(CO)5) and cobalt tricarbonyl nitrosyl (Co(CO)3NO), we report the fabrication of clean metallic nanostructures with lateral dimensions as small as 15 nm[1]. In this contribution, we investigate Fe, Co and mixed Fe/Co nanostructures using laterally resolved X-ray absorption spectroscopy (XAS) to access the spatial chemical composition, and for the characterization of the magnetic properties X-ray magnetic circular dichroism (XMCD) was employed[2]. The bulk composition and the magnetic properties will be presented and discussed.

Supported by the DFG via grant MA 4246/2-1 and Excellence Cluster "Engineering of Advanced Materials (EAM)" at the FAU Erlangen-Nürnberg and two granted beamtimes at the PolLux instrument at the Swiss Light Source (SLS).

[1] M.M. Walz et al., Angw. Chem. Int. Ed., 49 (2010), 4669;

[2] G. Schütz et al., Phys. Rev. Lett., 58(1987), 737.