Abstract
AbstractVarious ferroelectric simulation models have been developed in recent decades in order to study the mechanisms and predict the behaviors of ferroelectrics by simulating their hysteresis loops. Conventional ferroelectrics have wide optical band gaps (>2.7 eV), making them difficult to respond to visible light. Although their ferroelectricity can be affected by higher‐energy radiation like ultraviolet, little attention is paid to the development of their models incorporating light‐dependent factors. However, in recent years, narrow band gap (<2.5 eV) ferroelectrics have been discovered and are increasingly researched. These special ferroelectrics effectively absorb visible light and hence exhibit strongly light‐dependent ferroelectricity, triggering potentially a broad range of applications. Therefore, there is a need to develop a model for these ferroelectrics in order to predict their behavior under visible light. Such a model is also needed to improve the understanding of the interaction mechanisms between light and domains. In this paper, a ferroelectric simulation model based on the Jiles–Atherton theory considering light dependence is developed for the first time, and its accuracy is validated by experiments. The model shows an average error of 7.5% on polarization values compared to experimental results and thus can be employed to reliably predict photo‐induced ferroelectricity.
Highlights
Ni)O3-δ (KNBNNO, band gap 1.6 eV).[8]
A ferroelectric simulation model adapted from the Jiles–Atherton theory for ferromagnetic materials has been developed
It is the first time that the incident lighting condition has been taken into account for a ferroelectric model
Summary
Various ferroelectric simulation models have been developed in recent ferroelectricity strongly induced piezoelectricity and pyroelectricity. There is a need to develop a model for these ferroelectrics in order to predict their behavior under visible show light-dependent ferroelectric hysteresis loops (or the so called photo-induced ferroelectricity).[5] since the majority of the solar radiation is visible light, such materials can hardly trigger practilight. Such a model is needed to improve the understanding of the cal applications on this regime and thereinteraction mechanisms between light and domains. Tric materials, for instance, (K, Ba)(Nb, Ni)O3-δ (band gap 1.1 eV),[6] Bi(Fe0.5Cr0.5)O3 (band gap 1.4 eV),[7] and (K, Na, Ba)(Nb,
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