Dislocation-induced large local polarization inhomogeneity of ferroelectric materials. (15th March 2021)

• Record Type: Journal Article
• Authors: Li, Ning; Zhu, Ruixue; Cheng, Xiaoxing; Liu, Heng-Jui; Zhang, Zhangyuan; Huang, Yen-Lin; Chu, Ying-Hao; Chen, Long-Qing; Ikuhara, Yuichi; Gao, Peng
• Is Part Of: Scripta materialia. Number 194(2021)
• Publication Date: 2021-03-15
• Subjects: Dislocations -- PZT/STO -- ferroelectricity -- polarization inhomogeneity -- STEM; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.11.009
• Languages: English
• ISSNs: 1359-6462

Abstract

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 PbZr0.2 Ti0.8 O3 /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. Graphical abstract: Image, graphical abstract