Effect of calcination temperature on microstructure and magnetic properties of Ni0.5Zn0.25Cu0.25 Fe2O4 nanoparticles synthesized by sol-gel method

Abstract

This paper examines the effect of calcination process on the structural and magnetic properties material nanostructure composite of Ni0̇5Zn0̇25Cu0.25 Fe2O4 ferrites. The samples were successfully prepared by sol-gel method at different calcination temperature, which are 600°C, 700°C, 800°C and 900°C. Morphological investigation, average crystallite size and microstructure of the material were examined by using X-ray diffraction (XRD) and confirmed by high resolution transmission electron microscope (HRTEM) and field emission scanning electron microscope (FESEM). The effects of calcination temperature on the magnetic properties were calculated by using vibrating sample magnetometer (VSM). The XRD result shows single-phase cubic spinel structure with interval average size 5.9-38 nm, and grain size microstructure of the material was increasing with temperature increases. The highest magnetization saturation was reached at a temperature 800°C with value 53.89 emu/g, and the value coercive force (Hc) was inversely with the grain size.