Abstract

• Cobalt ferrite powders with general formula CoFe2O4 was synthesized by sol-gel auto combustion method starting from metal nitrates and citric acid (C6H8O7) as a fuel. X-ray diffraction technique (XRD) was used to confirm the crystallite structure and phase formation. The particle size was estimated by the full width half maximum (FWHM) of the strongest X-ray diffraction (XRD) peak (311). The average particle size was observed in the range of 42 to 54 nm. The scanning electron microscopy (SEM) was used to study the grain size, grain distribution of these samples. The dielectric property measurements were carried out by the help of a LCR meter. The dielectric constant and the loss tangent decreases rapidly with increasing frequency, and then reaches a constant value.The room temperature magnetization and demagnetization measurement was done by PERMAGRAPH L apparatus.