Magnetic and electrical properties of bulk BaTiO3+MgFe2O4 composite

BaTiO3+MgFe2O4 material system was synthesized by hybrid chemical process using chlorides and nitrates of barium, titanium, iron, and magnesium. Magnetic properties of the composite samples measured as a function of annealing conditions indicated soft magnetic behavior. Saturation specific magnetization from 8 21 emu/g was observed for samples annealed at temperature between 950 and 1150 °C. Variation of specific saturation magnetization with respect to annealing temperature was related with the distribution of Fe cations in the tetrahedral and octahedral sites of MgFe2O4. Electrical properties of the samples annealed at different temperatures were measured to analyze the coexistence of ferroelectric phase. Dielectric constant varying from 15 to 200 with respect to frequency was observed for samples annealed from 950 to 1150 °C.

Research highlights
► BaTiO3+MgFe2O4 material system was synthesized by hybrid chemical process.
► Magnetization was dependent to Fe cationic positions in polyhedrons.
► Migration of Fe cations were related with the annealing temperature.
► Retention of soft magnetic properties was possible in BaTiO3+MgFe2O4 composite.
► Dielectric properties were related with grain size and annealed temperature.