Authors : M. A. Borikar, A. S. Kakde, K. G. Rewatkar and D. M. Borikar
Page Nos : 128-130
Description :
Nanocrystalline powder of Co-Ti doped nickel ferrite has been prepared by sol-gel auto combustion method. XRD study shows formation of mono phase homogeneous compound with cubic structure. The average crystallite size of the prepared ferrite calculated using Scherrer equation was in the order of 26-34 nm. The lattice parameter is found to increase with increasing doping concentration of the Co-Ti content. The electrical resistivity as a function of temperature was investigated by using four probe technique. The observed results can be explained on the basis of verwey hopping mechanism between Fe2+ and Fe3+ ions. Dielectric constant (ὲ) was measured in the frequency range up to 10 KHz and they show dispersion with increase in frequency. The variation of mentioned parameter with frequency is explained qualitatively with the aid of conduction process theory.
Keywords: Nanocrystalline, sol-gel auto combustion, XRD, scherrer, dielectric constant, etc.
