Multiple Local Symmetries Result in a Common Average Polar Axis in High-Strain BiFeO3-Based Ceramics

被引：23

作者：

Wang, Ge ^{[1
,2
]}

Hu, Tengfei ^{[3
,4
]}

Zhu, Wenxuan ^{[5
,6
]}

Lu, Zhilun ^{[7
]}

Kleppe, Annette ^{[8
]}

Lopez, Maria Diaz ^{[8
]}

Feteira, Antonio ^{[9
]}

Sinclair, Derek C. ^{[2
]}

Fu, Zhengqian ^{[3
]}

Huang, Houbing ^{[5
,6
]}

Wang, Dawei ^{[10
]}

Reaney, Ian M. ^{[2
]}

机构：

[1] Univ Manchester, Dept Mat, Manchester S13 9PL, England

[2] Univ Sheffield, Dept Mat Sci & Engn, Sheffield S1 3JD, England

[3] Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine M, Shanghai 200050, Peoples R China

[4] Univ Chinese Acad Sci, Hangzhou Inst Adv Study, Sch Chem & Mat Sci, Hangzhou 310024, Peoples R China

[5] Beijing Inst Technol, Adv Res Inst Multidisciplinary Sci, Sch Mat Sci & Engn, Beijing 100081, Peoples R China

[6] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China

[7] Edinburgh Napier Univ, Sch Engn & Built Environm, Edinburgh EH10 5DT, Scotland

[8] Diamond Light Source Ltd, Harwell Sci & Innovat Campus, Didcot OX11 0DE, England

[9] Sheffield Hallam Univ, Mat & Engn Res Inst, Sheffield S1 1WB, England

[10] Harbin Inst Technol, Funct Mat & Acousto Opt Instruments Inst, Sch Instrumentat Sci & Engn, Harbin 150080, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 130卷 / 07期

基金：

英国工程与自然科学研究理事会; 中国国家自然科学基金;

关键词：

PHASE; ORIGIN; ELECTROSTRAIN; BEHAVIOR;

D O I：

10.1103/PhysRevLett.130.076801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

For the first time, the origin of large electrostrain in pseudocubic BiFeO3-based ceramics is verified with direct structural evidence backed by appropriate simulations. We employ advanced structural and microstructural characterizations of BiFeO3-based ceramics that exhibit large electrostrain (>0.4%) to reveal the existence of multiple, nanoscale local symmetries, dominantly tetragonal or orthorhombic, which have a common, averaged direction of polarization over larger, meso-or microscale regions. Phase-field simulations confirm the existence of local nanoscale symmetries, thereby providing a new vision for designing high-performance lead-free ceramics for high-strain actuators.

引用

页数：7

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