About the deformation of ferroelectric hystereses

Abstract

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Temperature dependent piezoelectric response and strain–electric-field hysteresis of rare-earth modified bismuth ferrite ceramics

“…3 d f). The S pp after ten electric-field cycles follows a similar trend to the current peak behavior as a function of RE-BFO composition ( Table 1 T 50,51 , that is, a progressive increase in the strain, current and polarization during switching-field cycling from the virgin state.…”

“…Here the current-electric-field (I-E) and strain-electric-field (S-E) hysteresis are displayed in favour of polarization-electric-field (P-E) hysteresis (Fig. 3), as leakage current contributions can obscure critical P-E features such as remnant polarization 50 . Typical P-E loops can be found in the supplementary materials.…”

Physical Mechanisms behind the Field‐Cycling Behavior of HfO2‐Based Ferroelectric Capacitors

“…[17] Wake-up and fatigue behaviors are due to a complex interplay among phenomena involving the ferroelectric properties (e.g., domain orientation, phase stability and field induced phase transitions) and dielectric characteristics (e.g., defect activation/creation, charge injection and consequent trapping), that could induce a built-in bias. [18,19] Even though those studies offered valuable first step insight into the behavior of these new materials, they were confined only to potential mechanisms separately and in a speculative manner. Therefore, a detailed study of the physical mechanisms responsible for the wake-up and fatigue phase in doped hafnium films is strongly required.…”

Fatigue effect on polarization switching dynamics in polycrystalline bulk ferroelectrics

“…16 In fact, statistical distributions of switching times can even be directly read out from polarization switching measurements over a wide time window if the inhomogeneous field mechanism (IFM) model is applied. 17,18 Experiments of this kind are reported seldom despite presenting a valuable tool for studying dynamic properties 19 alternative to measurements within the frequency domain. 8,20 The IFM-analysis is based on the hypothesis that the local polarization switching occurs according to a step-like process on the logarithmic time scale (in general similar to the KAI-model) with a switching time () E  dependent on the local electric field E utilizing the experimental finding of the strong field dependence of switching dynamics.…”