In situ determination of the interplay of the structure and domain under a subcoercive field in BiScO3–PbTiO3,Inorganic Chemistry Frontiers

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In situ determination of the interplay of the structure and domain under a subcoercive field in BiScO3–PbTiO3
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2021-08-19 , DOI: 10.1039/d1qi00670c
Longlong Fan _{1,

2} , Linxing Zhang ₃ , Hui Liu ₄ , Yu-sheng Chen ₂ , Yang Ren ₅ , Xianran Xing ₆ , Jun Chen _{4,

6}

Affiliation

The extraordinary performances of phase-coexisting ferroelectrics are significantly affected by not only the phase constitution but also the motion of domain walls. The study on the role of phase coexistence in the formation of ferroelectric and ferroelastic domain microstructures is of great importance to explain the enhanced piezoelectric properties. In situ high-energy diffraction and the Rayleigh law are utilized to reveal the interplay of phase constitution and domain configuration to the macroscopic electromechanical coupling effect in the morphotropic phase boundary composition of 0.365BiScO₃–0.635PbTiO₃ during the application of a weak electrical loading in the present study. It was found that anisotropic phase transition and domain switching occur in polycrystalline ferroelectric ceramics and a phase transition occurs dramatically beyond the coercive field. Taking into account the important role of coupled ferroelectric and ferroelastic domain microstructures, we conceived a configuration of monoclinic domains coexisting with and bridging the tetragonal domains. The existence of bridging domains would provide an insight into the interplay of the phase and domain and explains the piezoelectric performance in the vicinity of morphotropic phase boundaries.

中文翻译：

在亚矫顽力场下原位测定 BiScO3–PbTiO3 中结构和畴的相互作用

相共存铁电体的非凡性能不仅受相构成而且受畴壁运动的显着影响。研究相共存在铁电和铁弹性畴微结构形成中的作用对于解释增强的压电性能具有重要意义。利用原位高能衍射和瑞利定律揭示了相组成和畴构型的相互作用对 0.365BiScO ₃ –0.635PbTiO ₃同形相界组成中宏观机电耦合效应的影响在本研究中应用弱电负载期间。发现在多晶铁电陶瓷中发生各向异性相变和畴转换，并且在矫顽场之外发生显着的相变。考虑到耦合铁电和铁弹性域微结构的重要作用，我们设想了一种与四方域共存并桥接的单斜域配置。桥接域的存在将提供对相和域相互作用的深入了解，并解释同向相边界附近的压电性能。

更新日期：2021-08-19

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