Nanometer-scale local structural study of the paraelectric cubic phase of KNbO3 by convergent-beam electron diffraction

Kenji Tsuda; Michiyoshi Tanaka

doi:10.7567/JJAP.56.10PB09

Nanometer-scale local structural study of the paraelectric cubic phase of KNbO₃ by convergent-beam electron diffraction

Kenji Tsuda, Michiyoshi Tanaka

Advanced Interdisciplinary Research Division

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Nanometer-scale local structures of the paraelectric cubic phase of potassium niobate (KNbO₃) are examined by convergent-beam electron diffraction (CBED) using a nanometer-size electron probe. The breaking of the cubic symmetry has been directly observed in the nanometer-scale areas of the cubic phase of KNbO₃. This indicates the existence of local polarization clusters in the cubic phase. Symmetry breaking index maps for the fourfold rotation symmetry are given at different temperatures with the combined use of scanning transmission electron microscopy (STEM) and CBED (STEM-CBED).

Original language	English
Article number	10PB09
Journal	Japanese journal of applied physics
Volume	56
Issue number	10
DOIs	https://doi.org/10.7567/JJAP.56.10PB09
Publication status	Published - 2017 Oct

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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title = "Nanometer-scale local structural study of the paraelectric cubic phase of KNbO3 by convergent-beam electron diffraction",

abstract = "Nanometer-scale local structures of the paraelectric cubic phase of potassium niobate (KNbO3) are examined by convergent-beam electron diffraction (CBED) using a nanometer-size electron probe. The breaking of the cubic symmetry has been directly observed in the nanometer-scale areas of the cubic phase of KNbO3. This indicates the existence of local polarization clusters in the cubic phase. Symmetry breaking index maps for the fourfold rotation symmetry are given at different temperatures with the combined use of scanning transmission electron microscopy (STEM) and CBED (STEM-CBED).",

author = "Kenji Tsuda and Michiyoshi Tanaka",

note = "Funding Information: The authors are grateful to Professor M. Terauchi (IMRAM, Tohoku University) for his encouragement and support and to Mr. M. Ageishi (IMRAM, Tohoku University) for his maintenance of JEM-2010FEF. The present study was partially supported by JSPS KAKENHI Grant Number 25287068. Publisher Copyright: {\textcopyright} 2017 The Japan Society of Applied Physics.",

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AU - Tanaka, Michiyoshi

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N2 - Nanometer-scale local structures of the paraelectric cubic phase of potassium niobate (KNbO3) are examined by convergent-beam electron diffraction (CBED) using a nanometer-size electron probe. The breaking of the cubic symmetry has been directly observed in the nanometer-scale areas of the cubic phase of KNbO3. This indicates the existence of local polarization clusters in the cubic phase. Symmetry breaking index maps for the fourfold rotation symmetry are given at different temperatures with the combined use of scanning transmission electron microscopy (STEM) and CBED (STEM-CBED).

AB - Nanometer-scale local structures of the paraelectric cubic phase of potassium niobate (KNbO3) are examined by convergent-beam electron diffraction (CBED) using a nanometer-size electron probe. The breaking of the cubic symmetry has been directly observed in the nanometer-scale areas of the cubic phase of KNbO3. This indicates the existence of local polarization clusters in the cubic phase. Symmetry breaking index maps for the fourfold rotation symmetry are given at different temperatures with the combined use of scanning transmission electron microscopy (STEM) and CBED (STEM-CBED).

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Nanometer-scale local structural study of the paraelectric cubic phase of KNbO₃ by convergent-beam electron diffraction

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