Nickel-copper–zinc ferrite samples, Ni₀․₃₅Cu₀․₀₅Zn₀․₆₀InₓFe₂₋ₓO₄, with x = 0.00 to x =0.125 were prepared by sol-gel auto combustion method. The chemical phase analysis has been carried out by X-ray powder diffraction (XRD) method, which confirms the formation single phased cubic spinel structure with a crystallite size ranging from 25 to 45 nm. While increasing indium concentration, the lattice constant increases. On the XRD plot, this causes the diffraction peaks to shift toward lower 2θ angles. Since indium has a much higher atomic weight than iron, the X-ray density calculated from the XRD data will increase significantly as indium replaces iron. A higher peak intensity for indium-doped samples usually suggests improved crystallinity.

Keywords: Nickel-Copper–Zinc Ferrit;e X-Ray Powder Diffraction; Sol-Gel Auto-Combustion Technique;