Dielectric Properties of Ni-Co Nanoferrites Synthesized using Green Synthesis Process

A series of nickel doped cobalt (NixCo1-xFe2O4, x=0.0 to 1.0) were successfully synthesized using green synthesized process. Tensile strain of all positive slope samples observed from the W-H (Williamson Hall) plot. It was discovered that as Ni-substitution increased, the dielectric constant (є’) increased from 148.07 to 243.62. Conversely, when the amount of Ni-substitution increases, the dielectric loss (tan δ from 0.23 to 0.05), imaginary part (є’’ from 98.81 to 17.87), and ac conductivity (σac from 1.62 to 0.15) all decreases at 1MHz frequency. The purpose of current work is to investigate Williamson Hall effect and dielectric properties to find out the effects of nickel doping on the vibrational mode and crystal structure of cobalt ferrite. This demonstrates that when Ni-substitution increases, energy losses at high frequencies decrease. Dielectric constant and ac conductivity, of all samples act in accordance with Koop's theory, the Maxwell-Wagner polarization procedure, and electron hopping This makes them suitable materials for high-frequency applications