Magnetic and electrical transport properties of Cu 0.5 Ni 0.5 Fe 2 O 4 ferrite synthesized by plasma arc discharge process

In this study, the plasma arc discharge process was employed to synthesize nanocrystalline Cu 0.5 Ni 0.5 Fe 2 O 4 ferrite powders. A spinel-type ferrite structure has been formed successfully, exhibiting a saturation magnetization of 87 emu g −1 and a coercivity of 26 Oe. 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.