Magnetostriction in composites of LiFe 5O 8–BaTiO 3

Abstract

Polycrystalline lithium ferrite, LiFe 5O 8 was prepared by adopting two preparation techniques, the solid-state double sintering method and the sol–gel method. This ferrite powder was thoroughly mixed with barium titanate, BaTiO 3 for preparation of di-phasic composites of lithium ferrite and barium titanate. X-ray diffraction study of these composites revealed the presence of both the phases. Magnetostriction of these composites was measured in varying magnetic fields. The value of magnetostriction for the composites prepared by the sol–gel method was found to be higher than the values obtained in case of composites prepared by the solid-state method. Magnetostriction was found to decrease with increasing content of barium titanate. The saturation field was found to increase with the introduction of barium titanate.