HIGH CURIE TEMPERATURE OF NANOSIZED NiZn FERRITE PARTICLES SYNTHESIZED BY A COMBUSTION METHOD

Abstract

The magnetic properties of nanocrystalline powders of Ni 0.5 Zn 0.5 Fe 2 O 4 , synthesized at low temperatures, by a combustion method, have been investigated. Different powders containing crystallites of comparable average size, obtained by varying the synthesis conditions, show a large difference in the superparamagnetic blocking temperature due to the wide difference in the size distribution. The ferrite nanoparticles show large Curie temperature enhancement up to ~ 100 K, when compared to that of the bulk.