Dislocation-induced large local polarization inhomogeneity of ferroelectric materials

Ning Li; Ruixue Zhu; Xiaoxing Cheng; Heng Jui Liu; Zhangyuan Zhang; Yen-Lin Huang; Ying-Hao Chu; Long Qing Chen; Yuichi Ikuhara; Peng Gao

doi:10.1016/j.scriptamat.2020.11.009

Dislocation-induced large local polarization inhomogeneity of ferroelectric materials

Ning Li, Ruixue Zhu, Xiaoxing Cheng, Heng Jui Liu, Zhangyuan Zhang, Yen-Lin Huang, Ying-Hao Chu, Long Qing Chen, Yuichi Ikuhara, Peng Gao^*

^*Corresponding author for this work

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

11 Scopus citations

Abstract

Dislocations in ferroelectrics play important roles in ferroelectricity, piezoelectricity, and dielectricity. However, the intrinsic charge-lattice coupling mechanism in ferroelectric crystals containing dislocations is still not well understood. Here, we report a large local polarization inhomogeneity of ~100 μCcm⁻² induced by a single a[001] dislocation in the PbZr_0.2Ti_0.8O₃/SrTiO₃ film/substrate heterostructure, the tensile region (~120 μCcm⁻²) and the compressive strain region (~21 μCcm⁻²) around the dislocation forms a butterfly-like area. This study reveals the dramatic effects of dislocations on local polarization and provides a strategy to manipulate the polarization magnitude and orientation of local polarization by defect engineering.

Original language	English
Article number	113624
Pages (from-to)	1-5
Number of pages	5
Journal	Scripta Materialia
Volume	194
DOIs	https://doi.org/10.1016/j.scriptamat.2020.11.009
State	Published - 15 Mar 2021

Keywords

Dislocations
ferroelectricity
polarization inhomogeneity

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10.1016/j.scriptamat.2020.11.009

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title = "Dislocation-induced large local polarization inhomogeneity of ferroelectric materials",

abstract = "Dislocations in ferroelectrics play important roles in ferroelectricity, piezoelectricity, and dielectricity. However, the intrinsic charge-lattice coupling mechanism in ferroelectric crystals containing dislocations is still not well understood. Here, we report a large local polarization inhomogeneity of ~100 μCcm−2 induced by a single a[001] dislocation in the PbZr0.2Ti0.8O3/SrTiO3 film/substrate heterostructure, the tensile region (~120 μCcm−2) and the compressive strain region (~21 μCcm−2) around the dislocation forms a butterfly-like area. This study reveals the dramatic effects of dislocations on local polarization and provides a strategy to manipulate the polarization magnitude and orientation of local polarization by defect engineering.",

keywords = "Dislocations, ferroelectricity, polarization inhomogeneity",

author = "Ning Li and Ruixue Zhu and Xiaoxing Cheng and Liu, {Heng Jui} and Zhangyuan Zhang and Yen-Lin Huang and Ying-Hao Chu and Chen, {Long Qing} and Yuichi Ikuhara and Peng Gao",

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doi = "10.1016/j.scriptamat.2020.11.009",

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T1 - Dislocation-induced large local polarization inhomogeneity of ferroelectric materials

AU - Li, Ning

AU - Zhu, Ruixue

AU - Cheng, Xiaoxing

AU - Liu, Heng Jui

AU - Zhang, Zhangyuan

AU - Huang, Yen-Lin

AU - Chu, Ying-Hao

AU - Chen, Long Qing

AU - Ikuhara, Yuichi

AU - Gao, Peng

PY - 2021/3/15

Y1 - 2021/3/15

N2 - Dislocations in ferroelectrics play important roles in ferroelectricity, piezoelectricity, and dielectricity. However, the intrinsic charge-lattice coupling mechanism in ferroelectric crystals containing dislocations is still not well understood. Here, we report a large local polarization inhomogeneity of ~100 μCcm−2 induced by a single a[001] dislocation in the PbZr0.2Ti0.8O3/SrTiO3 film/substrate heterostructure, the tensile region (~120 μCcm−2) and the compressive strain region (~21 μCcm−2) around the dislocation forms a butterfly-like area. This study reveals the dramatic effects of dislocations on local polarization and provides a strategy to manipulate the polarization magnitude and orientation of local polarization by defect engineering.

AB - Dislocations in ferroelectrics play important roles in ferroelectricity, piezoelectricity, and dielectricity. However, the intrinsic charge-lattice coupling mechanism in ferroelectric crystals containing dislocations is still not well understood. Here, we report a large local polarization inhomogeneity of ~100 μCcm−2 induced by a single a[001] dislocation in the PbZr0.2Ti0.8O3/SrTiO3 film/substrate heterostructure, the tensile region (~120 μCcm−2) and the compressive strain region (~21 μCcm−2) around the dislocation forms a butterfly-like area. This study reveals the dramatic effects of dislocations on local polarization and provides a strategy to manipulate the polarization magnitude and orientation of local polarization by defect engineering.

KW - Dislocations

KW - ferroelectricity

KW - polarization inhomogeneity

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U2 - 10.1016/j.scriptamat.2020.11.009

DO - 10.1016/j.scriptamat.2020.11.009

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SN - 1359-6462

VL - 194

SP - 1

EP - 5

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 113624

ER -

Dislocation-induced large local polarization inhomogeneity of ferroelectric materials

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