Dielectric and Magnetic Properties of BaTiO₃-LaMnO₃Composites

We have investigated the dielectric and magnetic properties of ferroelectric-antiferromagnetic $BaTiO₃-LaMnO₃$ composite with changing relative mole percents. Due to high sintering temperature, i.e. $1150^\circC$, the Ba ion in $BaTiO₃$ seems to diffuse into $LaMnO₃$; resulting in $BaTiO₃-(La,Ba)MnO₃$ ferroelectric-ferromagnetic composite. At room temperature, $0.9BaTiO₃-0.1LaMnO₃$ composite exhibits considerable magnetization (${\sim}0.7\;emu/g\;at\;2000\;Oe$) and low coercive field (${\sim}5\;Oe$). Also it exhibits high dielectric constant (${\sim}560$) and low loss (${\sim}0.08$) at 10 kHz. This result may imply that $BaTiO₃-LaMnO₃$ could be suitable for a low leakage multiferroic composite.