Frequency dependence of magnetoelectric effect in epitaxial La0.7Sr0.3MnO3/BaTiO3 bilayer film

► The bilayer showed inherent ferromagnetic and ferroelectric properties. ► There is a particular frequency dependence of ME behavior from 0.1 kHz to 100 kHz. ► The ME voltage coefficient was around 213 mV/cm Oe at 1 kHz, which was at least one order of magnitude higher than the similar structures. ► The interface coupling coefficient k = 0.88 at 1 kHz. It revealed that there existed an excellent interface coupling between LSMO and BTO.