FTIR and Electrical Properties of Cr Substituted Li0. 5Fe2. 5− xO4 Synthesized Using Sol-Gel Auto Combustion

摘要: The highly desirable properties of lithium ferrite and various metal ion substituted lithium ferrite make it a useful material for many electronic and magnetic applications. This research used a simple sol-gel auto-combustion method for the synthesis of Cr substituted Li 0.5 Fe 2.5 O 4 ferrite. Here, in the B-site, Fe 3+ ions were swapped by non-magnetic Cr 3+ ions at different concentrations. All the samples of Cr substituted Li 0.5 Fe 2.5 O 4 were confirmed through X-ray diffraction patterns to have a single-phase spinel-type structure with cubic symmetry, which was thereafter confirmed by its refinement through Rietveld. An increase in the substitution of Cr 3+ instead of Fe 3+ ions in the spinel ferrite system results in an increased nanocrystalline size. The average crystallite size decreased from 30 nm to 10 nm with an increase in Cr 3+ content. Analogous particle size was evaluated through transmission electron …