The dielectric and leakage current behavior of CoFe2O4-BaTiO3 composite films prepared by combining method of sol-gel and electrophoretic deposition

Composite CoFe₂O₄-BaTiO₃ films were prepared by combining method of sol-gel and electrophoretic deposition. CoFe₂O₄ thick films were prepared by electrophoretic deposition method and then BaTiO₃ precursor solution was spin-coated on these thick films to obtain dense structure. X-ray diffraction indicated that the films consisted of both spinel CoFe₂O₄ and perovskite BaTiO₃ phase. Dielectric properties and leakage current conduction of the films were studied. Leakage current characterization of the films exhibits an Ohmic conduction behavior at lower electric field and space charge limited conduction behavior at higher electric field, respectively.