Poling of a ferroelectric medium by means of a built-in space charge field, with special reference to sintered magnetoelectric composites

Abstract

It has been observed that the sign and the magnitude of the magnetoelectric conversion in a magnetoelectric composite material depended on the treatment used to achieve electrical polarization. The observed phenomena can be explained by the existence of a space charge field in the ferro-electric phase, which arises due to the high temperature poling procedure used. This model has been confirmed by the sign of the piezoelectric effect in the pure ferroelectric phase which has been poled under the same conditions.