Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 1: Magnetic nanoparticles (joint session MA/CPP)

MA 1.3: Vortrag

Montag, 12. März 2018, 10:00–10:15, H 0112

Chemical and magnetic characterizations of ordered arrangements of magnetic nanoparticles — Asmaa Qdemat¹, Emmanuel Kentzinger¹, •Jin Xu², Giuseppe Portale², Marina Ganeva³, Stefan Mattauch³, Oleg Petracic¹, Ulrich Rücker¹, and Thomas Brückel¹ — ¹Jülich Centre for Neutron Science (JCNS) and Peter Grünberg Institute (PGI), JARA-FIT, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany — ²Herzog-Wilhelm-Allee — ³Jülich Centre for Neutron Science, Forschungszentrum Jülich, Outstation at MLZ, 85748 Garching, Germany

a.qdemat@fz-juelich.de Keywords: magnetic nanoparticles, grazing incidence small angle scattering, interparticle interactions

Magnetic nanoparticles and their assembly in highly ordered structures are principally interesting regarding the understanding of magnetic interactions and for future applications in information technology as e.g. magnetic data storage media or as material for spintronics.

The work to be presented focuses on the chemical and magnetic characterization of monolayer of CoFe2O4 nanoparticles on silicon substrate. Using Grazing Incidence Small Angle X-ray Scattering (GISAXS) we deduce the height profile of the nanoparticle, and a hexagonal ordering between those nanoparticles. Macroscopic magnetization measurement and polarized neutron reflectometry were used to deduce that the nanoparticles are weakly magnetized with respect to bulk CoFe2O4 and that a random in plane relative orientation of the nanoparticle magnetizations is obtained at zero applied field.