In this investigation the structural properties and Mössbauer parameters of Ce doped cobalt ferrite nanoparticles are presented. The preparation of the sample is done by nitrate route using sol-gel method and samples are sintered at 300°C for one hour. The XRD pattern shows the pure phases of ferrite in both pure and doped sample of cobalt ferrite. The XRD pattern of cerium doped sample is more scattered then pure sample which indicates that crystallization is weakening when a small amount of cerium is doped. After doping a decrease in particle size is (12nm for pure and 8nm for doped sample) found, this decrease is also verified by the presence of large doublet in Mössbauer spectra. The Mössbauer spectra show two sets of sextets and one doublet in pure as well as in cerium doped sample. Two sextets signify the ferrimagnetic nature of the sample and the doublet is attributed to the presence of superparamagnetic particles in the specimen. A structural formula is calculated by using Mössbauer parameters for both the samples and a substantial effect is found in cationic distribution between A and B sites. Magnetic moment per formula unit is also calculated in this study the values are found for pure and doped samples 4.314 µB and 4.596 µB respectively.

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