Dresden 2009 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 40: Poster II: Bio- and Molecular Magnetism (1-9); Magnetic Coupling Phenomena/Exchange Bias (10-15); Magnetic Particlicles and Clusters (16-29); Micro and Nanostructured Magnetic Materials (30-51); Multiferroics (52-64); Spin Injection in Heterostructures (65-67); Spin-Dyn./Spin-Torque (68-93); Spindependent Transport (94-108)
MA 40.24: Poster
Freitag, 27. März 2009, 11:00–14:00, P1A
Templated self-assembly of Fe3O4 nanoparticles in lithographically nanopatterned lines — •Maria Jose Benitez1,2, Oleg Petracic1, Mathias Feyen2, Anhui Lu2, and Hartmut Zabel1 — 1Institut für Experimentalphysik/Festkörperphysik, Ruhr-Universität Bochum, D-44780 Bochum — 2Max-Planck Institut für Kohlenforschung, D-45470 Mülheim an der Ruhr
We report on self-assembled Fe3O4 nanoparticle films on silicon substrates. Furthermore, using electron beam lithography we fabricate patterned trenches of 100-1000nm width for the assisted self-assembly of magnetite nanoparticles. The nanoparticles with a diameter of 20 nm were synthesized by thermal decomposition of iron oleate complex in trioctylamine and oleic acid. Individual nanoparticle behavior is governed by superparamagnetism. Above the blocking temperature, the self-assembled films and the templated nanoparticles show collective behavior due to dipolar coupling as evidenced from magnetometry measurements.