Study of NiFe_2O_4 and ZnFe_2O_4 Spinel Ferrites Prepared by Soft Mechanochemical Synthesis

摘要

Two types of ferrites, NiFe_2O_4 and ZnFe_2O_4 were prepared by soft mechanochemical synthesis. XRD and Raman spectroscopy were used to characterize theferrite samples. On the basis of magnetic measurements was confirmed that the degree of inversion changes after sintering. The conduction activation energy, AE was determined by fitting the DC conductivity data with the Arrhenius relation. The effect of temperature on impedance parameters was studied using an impedance analyzer in a wide frequency range (100 Hz -10 MHz). It was observed that the impedance spectra of NiFe_2O_4 andZnFe_2O_4 ferrites include both grain and grain boundary effects.