Effect of Li_(0.1)Zn_(0.9)O on Structural, Magnetic, and Electrical Properties of MgFe_2O_4 Prepared Using Hybrid Synthesis

摘要

Nano MgFe_2O_4 and Li_(0.1)Zn_(0.9)O bi-phase mixed metal oxide material was synthesized using hybrid process from metal organic sources to obtain different proportions of xMgFe_2O_4-(1 -x)Li_(0.1)Zn_(0.9)O [x = 1, 0.65, 0.5, 0.35, 0] samples. All the samples were thermally annealed at 1050 ℃ to study the effects occurring in magnetic properties with respect to structure. Crystal structure, microstructure and magnetic studies suggested the presence of dual phase grains densely packed with soft magnetic properties. Migration of cations among the polyhedral sites in the MgFe_2O_4 was confirmed by comparison of diffraction peak intensities of corresponding cation positions. Distribution of cations in tetrahedral and octahedral sites in MgFe_2O_4 along with formation of hard magnetic phase due to diffusion at grain boundaries were related to have a significant effect on the magnetic properties of MgFe_2O_4. Electronic entropy and the crystal field stabilization energies among the transitional metal compounds were termed as the governing factors for cation migrations in spinel magnetic phase. Dielectric constant was inversely proportional to concentration of Li_(0.1)Zn_(0.9)O phase.