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We report the results of an experimental study of thermal and magneticproperties of nanostructured ferrimagnetic iron oxide composites with grapheneand graphite fillers synthesized via the current activated pressure assisteddensification. The thermal conductivity was measured using the laser-flash andtransient plane source techniques. It was demonstrated that addition of 5 wt. %of equal mixture of graphene and graphite flakes to the composite results in afactor of x2.6 enhancement of the thermal conductivity without significantdegradation of the saturation magnetization. The microscopy and spectroscopiccharacterization reveal that sp2 carbon fillers preserve their crystalstructure and morphology during the composite processing. The strong increasein the thermal conductivity was attributed to the excellent phonon heatconduction properties of graphene and graphite. The results are important forenergy and electronic applications of the nanostructured permanent magnets.

Thermal and Magnetic Properties of Nanostructured Ferrimagnetic Composites with Graphene - Graphite Fillers