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Super-elastic ferroelectric single-crystal membrane with continuous electric dipole rotation

by Peng, Bin , Liu, Ming , Yao, Junxiang , Ye, Zuo-Guang , Sun, Jun , Li, Suzhi , Ren, Wei , Jia, Tingting , Ding, Xiangdong , Zhang, Yong-Qiang , Chen, Long-Qing , Han, Xu , Luo, Zhenlin , Li, Ju , Dong, Guohua , Zhou, Ziyao , Hu, Zhongqiang , Li, Jiangyu , Huang, Houbing , Yao, Mouteng , Nan, Ce-Wen

in Barium / Barium titanates / Deformation / Elasticity / Electric dipoles / Electric fields / Evolution / Ferroelectric materials / Ferroelectricity / Ferroelectrics / Flexible components / Membranes / Oxides / Single crystals

2019

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Super-elastic ferroelectric single-crystal membrane with continuous electric dipole rotation

2019

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2019

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Journal Article

Super-elastic ferroelectric single-crystal membrane with continuous electric dipole rotation

Peng, Bin,

Liu, Ming,

Yao, Junxiang,

Ye, Zuo-Guang,

Sun, Jun,

Li, Suzhi,

Ren, Wei,

Jia, Tingting,

Ding, Xiangdong,

Zhang, Yong-Qiang,

Chen, Long-Qing,

Han, Xu,

Luo, Zhenlin,

Li, Ju,

Dong, Guohua,

Zhou, Ziyao,

Hu, Zhongqiang,

Li, Jiangyu,

Huang, Houbing,

Yao, Mouteng,

Nan, Ce-Wen

2019

Overview

Ferroelectrics are usually inflexible oxides that undergo brittle deformation. We synthesized freestanding single-crystalline ferroelectric barium titanate (BaTiO₃) membranes with a damage-free lifting-off process. Our BaTiO₃ membranes can undergo a ~180° folding during an in situ bending test, demonstrating a super-elasticity and ultraflexibility. We found that the origin of the super-elasticity was from the dynamic evolution of ferroelectric nanodomains. High stresses modulate the energy landscape markedly and allow the dipoles to rotate continuously between the a and c nanodomains. A continuous transition zone is formed to accommodate the variant strain and avoid high mismatch stress that usually causes fracture. The phenomenon should be possible in other ferroelectrics systems through domain engineering. The ultraflexible epitaxial ferroelectric membranes could enable many applications such as flexible sensors, memories, and electronic skins.

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American Association for the Advancement of Science,The American Association for the Advancement of Science

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