COMPARATIVE STUDY OF STRUCTURAL, THERMAL, OPTICAL, ELECTRICAL AND DIELECTRIC PROPERTIES OF CuFe2O4 AND Cu0.9Zn0.06Mg0.04Fe2O4 NANO FERRITES

Abstract

In this study, CuFe2O4 and gives Cu0.9Zn0.06Mg0.04Fe2O4 nanoparticles were ssucessfuly synthesized by sol-gel combustion method using citric acid as a chelating agent. The Comparative study of thermal, structural, optical, electrical and dielectric properties were investigated using thermogravimetric analysis (TGA), differential thermal analysis (DTA), x-ray Powder diffraction (XRD), Fourier transform infrared (FT-IR), Spectroscopy UV-Vis spectroscopy and impendences spectroscopy (IS) characterization techniques. From the TGA/DTA study, the weight loss regions and the stable phase formation of both compounds were identified. The XRD analysis revealed that both the synthesized samples were cubic spinel structure with Fd-3m space groups. From XRD results, different structural parameters such as lattice parameter, unit cell volume and crystal size of CuFe2O4 and Cu0.9Zn0.06Mg0.04Fe2O4 ferrites were calculated. The FT-IR spectroscopy study showed that both ferrite samples exhibitd two strong absorbation bands, which are responsible for the formation of the synthesized materials. The optical energy gap values for CuFe2O4 and Cu0.9Zn0.06Mg0.04Fe2O4 were found to be 2.75eV and 2.7eV, respectively. Nyquist plots were done to investigate the effect of grain and grain boundary on the electrical properties of the synthesized compounds. The variation of dielectric property with frequency showed the dispersion behavior which is explained in the light of Maxwell–Wagner type of interfacial polarization.