Manipulation of structural, electrical and magnetic properties on zinc substitution in cobalt nanoferrite

Using wet chemical co-precipitation method cobalt-zinc nanoparticles (Co
1−x
Zn
x
Fe
2
O
4
, with x =0.2, 0.4, 0.6 and 0.8) were synthesized and sintered at 1200 °C. The single phase spinel formation of all the samples has been confirmed by X-ray diffraction pattern. The scanning electron microscopy (SEM) was utilized for surface morphology study of samples. Impedance spectroscopy and initial permeability studies for all compositions have been performed in the frequency range 1 kHz to 120 MHz. We observed that the initial permeability remains more or less stable up to certain higher frequency range. The DC electrical resistivity demonstrates a definite break that has been explained in the light of conduction mechanism.