Magnetic properties of nickel–zinc ferrite nanoparticles synthesized by coprecipitation

Abstract

Abstract The influence of Zn substitution in the magnetic properties of a nanoscale system Ni 1– x Zn x Fe 2 O 4 (where x = 0.0, 0.25, 0.50 and 0.75) was studied. The ferrites were synthesized by the coprecipitation technique. Transmission electron microscopy revealed a particle size around 4–15 nm, increasing with Zn content. FC/ZFC curves showed a typical superparamagnetic behavior in all samples. It was found that Zn substitution affects both the blocking temperature and the magnetization. The maximum magnetization at room temperature was 48 emu/g for the sample x = 0.50. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)