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 journalArticlepeer-review

8 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 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.

Original languageEnglish
Article number113624
Pages (from-to)1-5
Number of pages5
JournalScripta Materialia
Volume194
DOIs
StatePublished - 15 Mar 2021

Keywords

  • Dislocations
  • ferroelectricity
  • polarization inhomogeneity

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