Effect of heat treatment on structural and magnetic properties of Li–Ni ferrite prepared via sol–gel auto-combustion method

Nanocrystalline Li0.35Ni0.3Fe2.35O4 ferrites were prepared at different annealing temperatures by sol–gel auto-combustion method. The effects of the temperature on structure and magnetic properties synthesized Li–Ni characterized X-ray diffraction (XRD), scanning electron microscopy, Fourier transform infrared spectra Vibrating Sample Magnetometer, photoelectron spectrometer. Rietveld refinement XRD data confirmed occurrence phase transition from ?-spinel to ?-spinel, which ideal cation occupation lattice parameter can be obtained. grain size increased significantly with temperature. variation saturation magnetization well explained in terms ions tetrahedron octahedron. coercivity initially later decreased 115 37 Oe increase annealed could attributed fact that 600 °C-annealed is close single- multi-domain region.