Uzma G, Siddiqa A and Hayat Q
Ni-Zn ferrite (NixZn1-xFe2O4, for x=0, 0.1, 0.3, 0.5, 0.7) nanoparticles have been successfully synthesized using chemical coprecipitation method for two different compositions of nickel nitrides (Ni(NO3)2.6H2O) and nickel chlorides (NiCl2.6H2O) respectively. X-ray analysis explored that nanoparticles for each value of x have cubic spinal structure. No extra peaks were observed in XRD spectra indicating the absence of any un-reacted component in the samples for both the series. The d-spacing and lattice parameter were found to lay in the range of 2.54 Ao to 2.51 Ao and 8.42 Ao to 8.33 Ao for nickel chloride series and 2.56 Ao to 2.54 Ao and 8.49 Ao to 8.42 Ao for nickel nitride series respectively. Both of these decreased by increasing Ni doping due to the less ionic radius of Ni2+ ions then Zn2+ and for strong preference of Ni2+ ions for octahedral sites. The crystallite size was observed to vary between 10-13 nm and its value is maximum for x=0.3 for nickel chloride series, whereas it vary between 18-36 nm and its value is maximum for x=0.5 and x=0.7 which shows that by adding nickel chloride a better result of 10 nm is achieved at x=0.7 whereas, 18 nm is achieved at x=0.1 and it increases by increasing nickel nitride.
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