Effect of temperature on structural, morphological and magnetic properties of Cd_0.7Co_0.3Fe₂O₄ nanoparticles

Cadmium-substituted cobalt ferrite (Cd_0.7Co_0.3Fe₂O₄) nanoparticles were synthesized using a chemical synthesis method and synthesized particles were calcinated at 300 °C and 600 °C respectively. The samples were characterized in order to understand the temperature effect on structural, morphological, thermal, and magnetic properties. X-ray diffraction data confirm the formation of single-phase cubic structure and the average grain sizes were evaluated. The microstructural features were examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and compositional analysis carried out by energy dispersive spectroscopy (EDS). A vibrating sample magnetometer (VSM) was used to investigate the magnetic properties. The hysteresis curves of Cd_0.7Co_0.3Fe₂O₄ nanoparticles show enhancement of the coercivity with the increasing calcinated temperature. This enhancement is attributed to the transition from a multi-domain to a single-domain nature. The high and low frequency absorption bands of Cd_0.7Co_0.3Fe₂O₄ were investigated using FT-IR analysis. - Highlights: • Cd_0.7Co_0.3Fe₂O₄ nano particles are prepared by the chemical synthesis method. • X-ray diffraction data confirms the single phase cubic spinel structure. • The estimated particle sizes from the XRD are approximately 25 and 35 nm. • The coercivity and magnetization values increase with increasing the particle size. • FT-IR spectra indicate the fundamental vibrations of host lattices