DOI: https://doi.org/10.36347/sjpms.2025.v12i05.004

Pages: 172-187

Bare and calcium-doped Nickel ferrite (NiFe₂O₄) was prepared by sol-gel auto combustion method. This study investigates the structural and dielectric properties of bare and calcium doped NiFe₂O₄ nanoparticles. X-ray Diffraction (XRD) analysis confirmed the formation of a single-phase spinel structure, with slight shifts in peak positions indicating successful incorporation of Ca²⁺ into the NiFe₂O₄ lattice. The average crystallite size was found 25 nm and 20 nm for bare and doped nanoparticles. The slight shift in XRD showed due to the greater ionic radii of Ca as compared to Ni. Dielectric properties showed the increasing trend by Ca doping due to larger average crystallite size of doped as compared to bare nanoparticles. Overall, calcium doping in NiFe₂O₄ leads to enhanced dielectric properties, making it a viable candidate for advanced technological applications. Future studies should focus on optimizing the doping concentration and further exploring the mechanistic aspects of these enhancements to fully harness the potential of calcium-doped (NiFe₂O₄).