structural study of cobalt nano-ferrites doped with cadmium and cadmium-chromium using Raman spectroscopy

Ferrites are one of the magnetic ceramics that, due to their wide application in various industries, scientists have always tried to optimize their structural, magnetic, electrical, etc. properties. One of the analyzes that scientists use for structural characterization is Raman spectroscopy. In this research, cobalt ferrite nanoparticles doped with cadmium, as well as cadmium-chromium were synthesized. In order to confirm the spinel structure and obtain the structural parameters, X-ray diffraction analysis was performed. The particle size obtained between 53 and 59 nm and the lattice parameter between 8.39 and 8.52 angstroms. The photographs obtained from the Field Emission-Scanning Electron Microscope (FE-SEM) showed that the structure of nanoparticles consists of multi-particle aggregates consisting of spherical nanometer particles. Then the synthesized nanoparticles were subjected to Raman analysis, in addition to determining the spinel type of the samples, the changes in the cations distribution in the spinel lattice were investigated. In this analysis, it was observed that in addition to the five active Raman modes (A1g, Eg, 3T2g) that are characteristic of the spinel structure, other peaks that are characteristic of the mixed spinel structure are also visible in the Raman spectrum of the samples.