Berlin 2015 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 46: Magnetic Thin Films I

MA 46.11: Vortrag

Donnerstag, 19. März 2015, 17:45–18:00, H 1012

Magnetic properties of iron nanostructures fabricated with electron beam induced deposition — •Fan Tu, Martin Drost, Florian Vollnhals, Esther Carrasco, Andreas Späth, Rainer Fink, Hans-Peter Steinrück, and Hubertus Marbach — Physikalische Chemie II, Universität Erlangen-Nürnberg, Egerlandstr.3, D91058, Germany

In the mask-less, "direct writing" technique, electron beam induced deposition(EBID), a focused electron beam is used to locally decompose precursor molecules on a surface. The non-volatile decomposition products form a deposit, while the volatile fragments are pumped off. With iron pentacarbonyl, we are able to fabricate ferromagnetic iron nanostructures with controlled shape and high purity (>95%) in our ultra high vacuum system. By controlling the electron dose and the autocatalytic growth time, we can fabricate clean nanostructures with arbitrary thickness [1,2]. The nanostructures have been investigated at the PoILux beamline at the Swiss Light Source with Scanning Transmission X-ray Microscopy. X-ray Magnetic Circular Dichroism contrast enables to image magnetic domains of the individual deposits while applying a variable magnetic field. The corresponding magnetic properties can be quantified.

Supported by the DFG through grant MA 4246/1-2, research unit FOR 1878/funCOS; and the Excellence Cluster Engineering of Advanced Materials of the FAU Erlangen-Nürnberg.

[1] F. Vollnhals, et al., Beilstein J. Nanotech., 5 (2014) 1175.

[2] H. Marbach, Appl. Phys. A., 117 (2014) 987.