Dresden 2014 – scientific programme
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MA: Fachverband Magnetismus
MA 19: Poster I
MA 19.10: Poster
Tuesday, April 1, 2014, 13:00–15:30, P1
Magnetic Properties of Self-Assembled Fe2O3 Nanoparticles — •Alice Klapper1, Sabrina Disch2, Erik Wetterskog3, Michael Agthe3, Lennart Bergström3, Stefan Mattauch4, Oleg Petracic1, and Thomas Brückel1 — 1Jülich Centre for Neutron Science JCNS and Peter Grünberg Institut PGI, JARA-FIT, Forschungszentrum Jülich GmbH, 52425 Jülich, GERMANY — 2Institut Laue-Langevin, F-38042 Grenoble Cedex 9, FRANCE — 3Materials and Environmental Chemistry, Stockholm University, 10691 Stockholm, SWEDEN — 4Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, Outstation at MLZ, Lichtenbergstr. 1, 85748 Garching, GERMANY
Today’s requirements for data storage density grow continuously. Magnetic nanoparticles constitute a possible new recording material. Therefore, nanoparticle superlattices have moved into the focus of worldwide research activities. We follow an approach to investigate the magnetic ordering within mesocrystals of cubic shaped γ-Fe2O3 nanoparticles (NPs). The crystal structure of the superlattice has been obtained from GISAXS measurements. To have direct access to the magnetic inter-particle superspin-structure inside the supercrystals the usage of the GISANS technique with polarized neutrons is inevitable. We performed polarized GISANS measurements in various applied fields and obtained results, which are correlated to models of collective magnetic states inside mesocrystals.