Investigation of fatigue mechanisms in Pb(Zr, Ti)O-3 films from a correlated analysis of hysteresis parameters in a lattice model with distributed polarization clamping

Several hypotheses concerning possible fatigue mechanisms have been impleme nted in the Landau theory-based lattice model for switching, and their suit ability for explaining the fatigue of Pb(Zr,Ti)O-3 films has been examined. A correlated analysis of the fatigue behavior of the hysteresis loop param eters has been shown to offer precise criteria for validating the fatigue s cenarios and disclose the polarization state of fatigued ferroelectrics. Th e spatial distribution of bipolar clamping of polarization by a built-in el ectric field,in randomly spreading weak ferroelectricity regions, reflected with best accuracy the fatigue experimental data.