Structural and dielectric properties of Ni-Zn ferrite nanoparticles prepared by co-precipitation method

摘要

The dielectric properties of Ni1-xZnxFe2O4 ferrites (with x=0.0 to 0.7, dx=0.1) prepared by wet chemical co-precipitation method have been studied as a function of frequency, temperature and composition. The broad XRD peaks of green samples and TEM images confirm the nano dimension of prepared samples. Dispersion in the dielectric constant with frequency is observed and dielectric loss also shows decrease in its value with increasing frequency. The dielectric loss tangent was found to increase with frequency. Dielectric constant (epsilon'), dielectric loss (epsilon '') and loss tangent (tan delta) show strong temperature dependence at all frequencies. The temperature dependent results indicate that the values of epsilon', epsilon '' and tan delta increases with increasing temperature.