Two-dimensional mapping of polarizations of rhombohedral nanostructures in the orthorhombic phase of KNbO_3 by the combined use of scanning transmission electron microscopy and convergent-beam electron diffraction

Kenji Tsuda; Michiyoshi Tanaka

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Two-dimensional mapping of polarizations of rhombohedral nanostructures in the orthorhombic phase of KNbO_3 by the combined use of scanning transmission electron microscopy and convergent-beam electron diffraction

机译：扫描透射电子显微镜和会聚束电子衍射技术的结合，用于KNbO_3正交晶相中菱面体纳米结构极化的二维映射

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Rhombohedral nanostructures previously found in the orthorhombic phase of KNbO_3, by convergent-beam electron diffraction [Tsuda et al., Appl. Phys. Lett. 102, 051913 (2013)], have been investigated by the combined use of scanning transmission electron microscopy and convergent-beam electron diffraction. Two-dimensional distributions of the rhombohedral nanostructures, or nanometer-scale spatial fluctuations of polarization clusters, have been successfully visualized. The correlation length of the observed spatial fluctuations of local polarizations is related to the c_(pc)/a_(pc) ratio and the transition entropy.

机译：先前通过会聚束电子衍射在KNbO_3的斜方晶相中发现的菱形纳米结构[Tsuda等人，Appl.Natl.Acad.Sci.USA，90：1897]。物理来吧102，051913（2013）]，已通过结合使用扫描透射电子显微镜和会聚束电子衍射进行了研究。菱面体纳米结构的二维分布，或极化簇的纳米级空间波动，已成功实现可视化。观测到的局部极化空间涨落的相关长度与c_（pc）/ a_（pc）之比和跃迁熵有关。

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《Applied physics express》 |2015年第8期|081501.1-081501.4|共4页
作者
Kenji Tsuda; Michiyoshi Tanaka;
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Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan;

Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan;

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1. Two-dimensional mapping of polarizations of rhombohedral nanostructures in the tetragonal phase of BaTiO_3 by the combined use of the scanning transmission electron microscopy and convergent-beam electron diffraction methods [J] . Kenji Tsuda, Akira Yasuhara, Michiyoshi Tanaka Applied Physics Letters . 2013,第8期

机译：结合使用扫描透射电子显微镜和会聚束电子衍射方法对BaTiO_3的四方相中菱面体纳米结构的极化进行二维映射
2. Observation of rhombohedral nanostructures in the orthorhombic phase of KNbO_3 using convergent-beam electron diffraction [J] . Kenji Tsuda, Rikiya Sano, Michiyoshi Tanaka Applied Physics Letters . 2013,第5期

机译：用会聚束电子衍射观察KNbO_3正交相中菱形的纳米结构
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Two-dimensional mapping of polarizations of rhombohedral nanostructures in the orthorhombic phase of KNbO_3 by the combined use of scanning transmission electron microscopy and convergent-beam electron diffraction

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