The Magneto-electric effect is conversion of magnetic energy into electric energy and viceÂversa. This effect is exhibited by the ferrite and ferroelectric composites. Neither the ferrite nor the ferroelectric can exhibit this phenomenon independently. The intermediate stage in the conversion of the two energies ismechanical energy. Thus, the efficiency of intermediate stage of conversion process can affect the process and also the innate properties of both the phases in the composite. In this paper, it is reported that the application of electric field to the CuFe2O4 Â BaTiO3 composites increases the permeability of CuFe2O4 phase in the composite.