Electric-field response of polar nanodomains in BaTiO3

被引：7

作者：

Morikawa, D. ^{[1
]}

Tsuda, K. ^{[2
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

[2] Tohoku Univ, Frontier Res Inst Interdisciplinary Sci, Sendai, Miyagi 9808578, Japan

来源：

APPLIED PHYSICS LETTERS | 2021年 / 119卷 / 05期

关键词：

CRYSTAL STRUCTURAL PARAMETERS; ORDER-DISORDER; PHASE; SYMMETRY; REFINEMENT; POLARIZATION; DIFFRACTION; MICROSCOPY; BEHAVIOR;

D O I：

10.1063/5.0058977

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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 degrees and 180 degrees 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. Published under an exclusive license by AIP Publishing.

引用

页数：6

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