Domain wall clamping in ferroelectrics by orientation of defects

Abstract

A quantitative model which describes the aging of the material properties in acceptor doped ferroelectric ceramics as a result of the reorientation of defects in time is proposed. By this reorientation the domain walls are clamped by a time dependent force leading to the observed decrease of the material properties during aging. The model is experimentally confirmed with aging and deaging measurements on barium titanate and lead zirconate titanate ceramics.