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An intriguing intermediate state as a bridge between antiferroelectric and ferroelectric perovskites
Materials Horizons ( IF 12.2 ) Pub Date : 2020-05-02 , DOI: 10.1039/d0mh00253d Hui Liu 1, 2, 3, 4 , Zhengyang Zhou 4, 5, 6, 7, 8 , Yi Qiu 4, 5, 6, 7, 8 , Botao Gao 1, 2, 3, 4 , Shengdong Sun 1, 2, 3, 4 , Kun Lin 1, 2, 3, 4 , Lei Ding 9, 10, 11, 12, 13 , Qiang Li 1, 2, 3, 4 , Yili Cao 1, 2, 3, 4 , Yang Ren 14, 15, 16, 17, 18 , Junliang Sun 4, 5, 6, 7, 8 , Xianran Xing 1, 2, 3, 4 , Jun Chen 1, 2, 3, 4
Materials Horizons ( IF 12.2 ) Pub Date : 2020-05-02 , DOI: 10.1039/d0mh00253d Hui Liu 1, 2, 3, 4 , Zhengyang Zhou 4, 5, 6, 7, 8 , Yi Qiu 4, 5, 6, 7, 8 , Botao Gao 1, 2, 3, 4 , Shengdong Sun 1, 2, 3, 4 , Kun Lin 1, 2, 3, 4 , Lei Ding 9, 10, 11, 12, 13 , Qiang Li 1, 2, 3, 4 , Yili Cao 1, 2, 3, 4 , Yang Ren 14, 15, 16, 17, 18 , Junliang Sun 4, 5, 6, 7, 8 , Xianran Xing 1, 2, 3, 4 , Jun Chen 1, 2, 3, 4
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The configuration of electric or magnetic dipoles embedded into a crystal lattice gives rise to the defining physical properties of a functional material. The prevailing antiferroelectric materials have so far been allusively assumed to be in a strict antiparallel electric polarization configuration, although they have shown huge potential applications for use in electronic devices. Herein, we have revealed for the first time the complex crystal structure of an intermediate state between the two conventional antiferroelectric (AFE) and ferroelectric (FE) states in PbZrO3-based perovskites by employing a combination of advanced synchrotron X-ray, neutron and three-dimensional (3D) electron diffraction techniques. We found that the intermediate state displays an intriguing flexible configuration of a sinusoidal wave functional with imbalanced polarization, different to the commonly believed antiparallel and balanced polarization. Such an intermediate state was concluded to act as a bridge between the conventional AFE and FE states. Our observations offer new insight into the AFE state and its transformation into the FE state. Such an intermediate state with a unique polarization configuration is believed to be a common feature that occurs in high-performance AFE perovskite materials.
中文翻译：
有趣的中间态，作为反铁电和铁电钙钛矿之间的桥梁
嵌入晶格中的电或磁偶极子的配置产生了功能材料的定义物理特性。迄今为止，虽然已经显示出流行的反铁电材料已经显示出在电子设备中的巨大潜在应用，但仍假定它们是严格的反平行极化结构。本文中，我们首次揭示了PbZrO 3中两个常规反铁电（AFE）和铁电（FE）态之间的中间态的复晶体结构。先进的同步加速器X射线，中子和三维（3D）电子衍射技术的结合，制成了钙钛矿。我们发现，中间状态显示了具有不平衡极化的正弦波功能的有趣的灵活配置，与通常认为的反平行和平衡极化不同。结论是，这种中间状态充当了常规AFE和FE状态之间的桥梁。我们的观察为AFE状态及其向FE状态的转变提供了新的见解。这种具有独特极化构型的中间状态被认为是在高性能AFE钙钛矿材料中出现的共同特征。
更新日期：2020-07-06
中文翻译：
有趣的中间态，作为反铁电和铁电钙钛矿之间的桥梁
嵌入晶格中的电或磁偶极子的配置产生了功能材料的定义物理特性。迄今为止，虽然已经显示出流行的反铁电材料已经显示出在电子设备中的巨大潜在应用，但仍假定它们是严格的反平行极化结构。本文中，我们首次揭示了PbZrO 3中两个常规反铁电（AFE）和铁电（FE）态之间的中间态的复晶体结构。先进的同步加速器X射线，中子和三维（3D）电子衍射技术的结合，制成了钙钛矿。我们发现，中间状态显示了具有不平衡极化的正弦波功能的有趣的灵活配置，与通常认为的反平行和平衡极化不同。结论是，这种中间状态充当了常规AFE和FE状态之间的桥梁。我们的观察为AFE状态及其向FE状态的转变提供了新的见解。这种具有独特极化构型的中间状态被认为是在高性能AFE钙钛矿材料中出现的共同特征。
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