Large magnetoelectric properties in CoFe2O4:BaTiO3 core-shell nanocomposites

Composites of ferroelectric and magnetostrictive materials show more magnetoelectric coupling than single phase materials. Core-shell CoFe2O4:BaTiO3 nanocomposites (1:1 weight ratio) and a mixture of both of them have been synthesized by a combination of hydrothermal and sol gel techniques. X ray diffraction analysis confirms the presence of both the materials in the samples. High Resolution Transmission Electron Microscope images confirm the core shell structure. The magnetoelectric coupling effect is investigated by measuring the magnetoelectric coefficient. It is observed that the coefficient is 35 times larger in the core-shell nanocomposites compared to that of the mixture.