Multiple local symmetries result in a common average polar axis in high-strain BiFeO3-based ceramics

Ge Wang; Tengfei Hu; Wenxuan Zhu; Zhilun Lu; Annette Kleppe; Maria J. Lopez-Diaz; Antonio Feteira; Derek C. Sinclair; Zhengqian Fu; Houbing Huang; Dawei Wang; Ian M. Reaney

doi:10.1103/PhysRevLett.130.076801

Multiple local symmetries result in a common average polar axis in high-strain BiFeO3-based ceramics

Ge Wang, Tengfei Hu, Wenxuan Zhu, Zhilun Lu, Annette Kleppe, Maria J. Lopez-Diaz, Antonio Feteira, Derek C. Sinclair, Zhengqian Fu, Houbing Huang, Dawei Wang, Ian M. Reaney

Materials Engineering

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

Abstract

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 characterisations of BiFeO3 based ceramics that exhibit large electrostrain (>0.4%) to reveal the existence of multiple, nanoscale local symmetries, dominantly tetragonal/orthorhombic, which have a common, averaged direction of polarisation over larger, meso/micro- scale 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.

Original language	English
Article number	076801
Journal	Physical Review Letters
Volume	130
Early online date	14 Feb 2023
DOIs	https://doi.org/10.1103/PhysRevLett.130.076801
Publication status	E-pub ahead of print - 14 Feb 2023

Keywords

local structure
piezoelectric
electrostain
symmetry
phase-field simulation

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10.1103/PhysRevLett.130.076801

Accepted ManuscriptAccepted author manuscript, 2.27 MB

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Wang, G., Hu, T., Zhu, W., Lu, Z., Kleppe, A., Lopez-Diaz, M. J., Feteira, A., Sinclair, D. C., Fu, Z., Huang, H., Wang, D., & Reaney, I. M. (2023). Multiple local symmetries result in a common average polar axis in high-strain BiFeO3-based ceramics. Physical Review Letters, 130, Article 076801. Advance online publication. https://doi.org/10.1103/PhysRevLett.130.076801

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abstract = "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 characterisations of BiFeO3 based ceramics that exhibit large electrostrain (>0.4%) to reveal the existence of multiple, nanoscale local symmetries, dominantly tetragonal/orthorhombic, which have a common, averaged direction of polarisation over larger, meso/micro- scale 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.",

keywords = "local structure, piezoelectric, electrostain, symmetry, phase-field simulation",

author = "Ge Wang and Tengfei Hu and Wenxuan Zhu and Zhilun Lu and Annette Kleppe and Lopez-Diaz, {Maria J.} and Antonio Feteira and Sinclair, {Derek C.} and Zhengqian Fu and Houbing Huang and Dawei Wang and Reaney, {Ian M.}",

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doi = "10.1103/PhysRevLett.130.076801",

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AU - Wang, Ge

AU - Hu, Tengfei

AU - Zhu, Wenxuan

AU - Lu, Zhilun

AU - Kleppe, Annette

AU - Lopez-Diaz, Maria J.

AU - Feteira, Antonio

AU - Sinclair, Derek C.

AU - Fu, Zhengqian

AU - Huang, Houbing

AU - Wang, Dawei

AU - Reaney, Ian M.

PY - 2023/2/14

Y1 - 2023/2/14

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AB - 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 characterisations of BiFeO3 based ceramics that exhibit large electrostrain (>0.4%) to reveal the existence of multiple, nanoscale local symmetries, dominantly tetragonal/orthorhombic, which have a common, averaged direction of polarisation over larger, meso/micro- scale 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.

KW - local structure

KW - piezoelectric

KW - electrostain

KW - symmetry

KW - phase-field simulation

U2 - 10.1103/PhysRevLett.130.076801

DO - 10.1103/PhysRevLett.130.076801

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SN - 0031-9007

VL - 130

JO - Physical Review Letters

JF - Physical Review Letters

M1 - 076801

ER -

Multiple local symmetries result in a common average polar axis in high-strain BiFeO3-based ceramics

Abstract

Keywords

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