Abstract
Structural, magnetic properties of Zn0.7-xNixMg0.2Cu0.1Fe2O4 ferrites (x = 0.00 - 0.70), synthesized by sol-gel auto-combustion method has been studied by X-ray diffraction (XRD), magnetic measurements. Scherrer’s grain diameter (D) range between 17.29-24.31 nm. Observed linear decrease in experimental and theoretical lattice parameter (aexp., ath.) is credited to the replacement of Zn2+ ion by Ni2+. Yafet Kittle angle (αY-K), effective bond length (Reff.), concentration of Fe3+ ions on B site (Fe3+B) and the bond angles θ3, θ4 decreases up to x = 0.56, suggest weakening of B-B interaction and, strengthening of A-B, A-A interaction. But at x = 0.7, αY-K, Reff., Fe3+B, θ3, θ4 increases, indicating strengthening of B-B interaction and, weakening of A-B and A-A interaction. Highest saturation magnetization of 39.19 A m2/kg (x = 0.42), lowest coercivity of 318.90 Oe is obtained for x = 0.14. Scanning Electron Microscope images display particle agglomeration. Energy dispersive x-ray analysis confirms presence of all elements present in sample.
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