Magnetic and electrical transport properties of Cu_0.5Ni_0.5Fe₂O₄ ferrite synthesized by plasma arc discharge process

Abstract

In this study, the plasma arc discharge process was employed to synthesize nanocrystalline Cu0.5Ni0.5Fe2O4 ferrite powders. The formation of a spinel-type structure of ferrite has been confirmed using X-ray diffraction. X-ray diffraction analysis conclusively verified the formation of a spinel-type ferrite structure. The investigation involved studying the frequency and temperature dependence of dielectric permittivity, dielectric loss, and DC/AC conductivity over a broad frequency range (1 kHz–1 MHz) in a temperature range of 298 K–403 K. The highest value of the dielectric contestant (4746) is observed at a frequency of 1 kHz and temperature of 313 K. A maximum in the DC conductivity is observed at 403 K, which can be ascribed to the combined effects of thermally activated hopping and an increase in the concentration of both n-type and p-type charge carriers at higher temperatures.