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

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 (US)
Article number	113624
Journal	Scripta Materialia
Volume	194
DOIs	https://doi.org/10.1016/j.scriptamat.2020.11.009
State	Published - Mar 15 2021

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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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.",

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

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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.

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VL - 194

JO - Scripta Materialia

JF - Scripta Materialia

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ER -

Dislocation-induced large local polarization inhomogeneity of ferroelectric materials

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