Vol. 1, Issue 12 (2016)
Effect of gamma irradiation on ac conductivity, dielectric and magnetic properties of CdFe2O4 ferrite
Author(s): E Nagaraja, AS Jagadisha, HS Jayanna
Abstract: CdFe2O4 ferrite is prepared by ceramic technique. The prepared samples are irradiated using high energy gamma radiation of 60Co source with a dose rate 6.972 kGy per hour to different doses of 300 kGy and 500 kGy. The XRD spectra are obtained for the irradiated samples and compared with that of the pristine sample to study the changes in the structure. The obtained results showed that the crystallite size decreases and lattice strain increases with the increase of radiation dose. Variation of ac conductivity, dielectric constant and dielectric loss ε'' with frequency and radiation dose at room temperature are studied for the CdFe2O4 ferrite. Room temperature M-H curves are traced for the un-irradiated and irradiated samples. It is observed that the electrical properties, ac conductivity, dielectric constant ε' and dielectric loss ε'' and magnetic properties, saturation magnetization Ms and remanence Mr are all increased after gamma irradiation.