Effect of Ba doping on magnetic, ferroelectric, and magnetoelectric properties in mutiferroic BiFe O3 at room temperature

Abstract

Ba doped BiFe O3 compounds were prepared by a solid-state reaction. X-ray diffraction showed that Bi1-x Bax Fe O3 was single phase up to x=0.25. These samples exhibited magnetism and ferroelectricity simultaneously at room temperature. The magnetoelectric coupling was evidenced by the increase of the dielectric constant with the increase of the applied magnetic field. For Bi0.75 Ba0.25 Fe O3 with ΔH=8 kOe, the values of [εr (H) - εr (0)] εr (0) are 1.7% and 1% for 80 and 300 K, respectively. © 2006 American Institute of Physics.