Fatigue effect on polarization switching dynamics in polycrystalline   bulk ferroelectrics
  Statistical distribution of switching times is a key information necessary to describe the dynamic response of a polycrystalline bulk ferroelectric to an applied electric field. The Inhomogeneous Field Mechanism (IFM) model offers a useful tool which allows extraction of this information from polarization switching measurements over a large time window. In this paper, the model was further developed to account for the presence of non-switchable regions in fatigued materials. Application of the IFM- analysis to bipolar electric cycling induced fatigue process of various lead-based and lead-free ferroelectric ceramics reveals different scenarios of property degradation. Insight is gained into different underlying fatigue mechanisms inherent to the investigated systems. 
S. Zhukov, J. Glaum, H. Kungl, E. Sapper, R. Dittmer, Y.A. Genenko,   and H. von Seggern
cond-mat.mtrl-sci