Regensburg 2002 – wissenschaftliches Programm
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MA: Magnetismus
MA 9: Magnetische Partikel / Cluster
MA 9.7: Vortrag
Dienstag, 12. März 2002, 15:30–15:45, H22
Magneto-optical behaviour of Co and magnetite nanoparticles — •Beata Kalska-Szostko1, Christian Müller1, Jens Paggel1, Paul Fumagalli1, Michael Hilgendorff2, Michael Giersig2, and Jakub Rybczynski2 — 1Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, 14195 Berlin — 2Hahn-Meitner-Institut Berlin, Glinicker Str. 100, 14109 Berlin
Nanomaterials show many properties, which are different from the bulk properties of the constituents. We will present magneto-optical results from our Co (8, 10 and 12 nm) and magnetite (15nm) samples prepared on various substrates. The magneto-optical properties are influenced by the concentration of particles, the substrate, and the way of sample preparation. We have studied a number of prototypical systems by magneto-optical Kerr effect. In general, all samples show the opposite sign of the Kerr rotation compared to bulk values of reference systems. The Kerr spectra of the particle systems are influenced by the arrangement (ordered vs. aligned) of the individual particles in the film.
This work is supported by the European Community under contract no. HPRN-CT-1999-00150.