Enhanced magnetoelectric properties of the laminated BaTiO3/CoFe2O4 composites

Magnetoelectric laminated composites of BaTiO3/CoFe2O4 were prepared by the conventional solid-state sintering method. The electrical, magnetic and magnetoelectric properties of the composites were investigated. The results show that BaTiO3 and CoFe2O4 phases can coexist in the composites. Compared with the magnetoelectric particulate composites, the magnetoelectric laminated composites have higher resistivities and lower leakage currents. The magnetoelectric behaviors are strongly dependent on the relative mass ratio of BaTiO3 and CoFe2O4. The largest magnetoelectric coefficient of the laminated composite reaches up to 135 mV/cm Oe at a bias magnetic field of 2600 Oe and a frequency of 1 kHz, which is four times as large as that of the particulate composite (35 mV/cm Oe).