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KR: Fachgruppe Kristallographie

KR 5: Poster Multiferroics (Joint Session of MA, DF, DS, KR, TT)

KR 5.13: Poster

Tuesday, March 15, 2011, 10:45–13:00, P2

Shape dependant oxidation of cobalt nanoparticles — •Britta Vogel, Katrin Eckstädt, Nadine Mill, Alexander Auge, Jan-Philipp Grote, and Andreas Hütten — Department of Physics, University of Bielefeld, D-33615 Bielefeld, Germany

Cobalt nanoparticles have been prepared as spheres, discs and cubes. Then the decrease of the saturation magnetisation by oxidation was determined with an AGM. The oxidation curves differ with the shape of the nanoparticles. To gain information about the oxidation processes, investigations concerning the surface of the particles were made, which exhibit an interesting connection between the shape and the oxidation behaviour.