Electric-field response of polar nanodomains in BaTiO3

D. Morikawa; K. Tsuda

doi:10.1063/5.0058977

Electric-field response of polar nanodomains in BaTiO₃

D. Morikawa, K. Tsuda

研究成果: Article › 査読

2 被引用数 (Scopus)

抄録

In this study, we have investigated the electric-field response of polar nanodomains in the ferroelectric tetragonal phase of BaTiO₃. Polar nanodomains were observed by a combination of scanning transmission electron microscopy (STEM) and convergent-beam electron diffraction (CBED). By applying an electric-field, significant changes in the distributions of nanometer-size domains were observed, besides the changes in the configurations of mesoscopic 90° and 180° ferroelectric domains. The obtained CBED patterns are categorized into three. One has higher tetragonal symmetry, and the other two show a deviation from tetragonal symmetry and exhibit a left-right reversal relation with each other. We propose a structural model of the rhombohedral nanodomain redistribution to reproduce the observed CBED patterns. The model consists of a balanced change in volume and size of rhombohedral nanodomains.

本文言語	English
論文番号	052904
ページ（範囲）	1ENG
ジャーナル	Applied Physics Letters
巻	119
号	5
DOI	https://doi.org/10.1063/5.0058977
出版ステータス	Published - 2021 8月 2

ASJC Scopus subject areas

物理学および天文学（その他）

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10.1063/5.0058977

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abstract = "In this study, we have investigated the electric-field response of polar nanodomains in the ferroelectric tetragonal phase of BaTiO3. Polar nanodomains were observed by a combination of scanning transmission electron microscopy (STEM) and convergent-beam electron diffraction (CBED). By applying an electric-field, significant changes in the distributions of nanometer-size domains were observed, besides the changes in the configurations of mesoscopic 90° and 180° ferroelectric domains. The obtained CBED patterns are categorized into three. One has higher tetragonal symmetry, and the other two show a deviation from tetragonal symmetry and exhibit a left-right reversal relation with each other. We propose a structural model of the rhombohedral nanodomain redistribution to reproduce the observed CBED patterns. The model consists of a balanced change in volume and size of rhombohedral nanodomains.",

author = "D. Morikawa and K. Tsuda",

note = "Funding Information: The authors thank Professor Masami Terauchi for the fruitful discussions and Mr. M. Ageishi and Ms. K. Sato of Tohoku University for their support during the experiments. This work was partially supported by JSPS KAKENHI Grant Nos. JP18H03674, JP18K18931, JP19K14623, and 20H05176, the Research Program of “Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials” in “Network Joint Research Center for Materials and Devices.” Publisher Copyright: {\textcopyright} 2021 Author(s).",

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