Determination of magnetic properties of nano-size CoFe2O4 particles synthesized by combination of sol-gel auto-combustion and ultrasonic irradiation techniques by combination of sol-gel auto-combusti

Nano-crystalline CoFe2O4 powder was prepared by combination of sol-gel auto-combustion and ultrasonic irradiation methods from metal nitrades and glycine. The resulting powders were investigated using X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM). The grains observed in as-burnt powder were proved to be CoFe2O4 nano-crystallites with high dispersibility and low agglomeration. The crystallite size of as-formed powders was 39.12 nm. The crystalline cobalt ferrite powders with magnetic properties having a maximum saturation magnetization (44.02 emu/g) was achieved for Fe3+/Co2+ molar ratio 1:1 and calcination temperature 750°C for 4 h. Our results indicate that this method might provide a promising option for synthesizing high-quality CoFe2O4 nano-powder.