Preparation and performance of CuFe2O4and ZnFe2O4magnetic nanocrystals

Abstract

Based on the coprecipitation of FeSO4(NH4)2SO4 with CuCl2 and ZnSO4, CuFe2O4 and ZnFe2O4 nanocrystals were successfully synthesized. The morphology and the crystal structures of the nanoparticles were studied via SEM, TEM and XRD, which showed that MFe2O4 samples were formed aggregated nanoparticles with crystal sizes of 16 ∼ 20 nm with a narrow dispersion in size. The samples had the typical spinel structures. Magnetic analyses demonstrated that the CuFe2O4 sample had the saturation magnetization (Ms) of 10.10 emu g-1 with the coercivity of 92.18 Oe, while the ZnFe2O4 sample had the Ms of 8.27 emu g-1 with the coercivity of 25.42 Oe at room temperature, respectively.