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KR: Fachverband Kristallographie

KR 10: Poster: Multiferroics (with MA, DF, KR, DS)

KR 10.65: Poster

Dienstag, 23. März 2010, 10:45–13:45, Poster A

Characterization of bioinspired synthesized magnetic nanoparticles — •Annalena Wolff¹, Katrin Eckstädt¹, Dieter Akemeier¹, Inga Ennen¹, Irina Dück¹, Katrin Wollschläger², Norbert Sewald², and Andreas Hütten¹ — ¹Department of Physics, University of Bielefeld, Germany — ²Department of Chemistry, University of Bielefeld, Germany

Size distribution, morphology and magnetization of nanoparticles are important properties in many applications. In this study Cobalt Ferrite nanocrystals were synthesized using a biomineralization protein containing 25 amino acids and oxidative coprecipitation of Co²⁺ and Fe²⁺. An AGM was used for magnetization measurements. A FIB DualBeam System was used to examine the morphology and size distribution. Furthermore the morphology and size distribution of chemically produced CoAu nanoparticles was examined with the DualBeam System and the magnetization with an AGM. Previously GMR was succesfully measured on CoRuNanoparticles structures. Now GMR was measured of a setup consisting of two gold contacts which are connected through a structured monolayer of CoAu nanoparticles. GMR was measured at room temperature and at low temperatures. Two point measurements and four point geometry measurements on single particle are planned.