期刊
SCRIPTA MATERIALIA
卷 194, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2020.11.009
关键词
Dislocations; PZT/STO; ferroelectricity; polarization inhomogeneity; STEM
类别
资金
- National Basic Research Program of China [2016YFA0300804]
- National Natural Science Foundation of China [51672007, 11974023]
- Key Area R&D Program of Guangdong Province [2018B010109009]
- Key R&D Program of Guangdong Province [2018B030327001]
- National Equipment Program of China [ZDYZ2015-1]
- 2011 Program of Peking-Tsinghua-IOP Collaborative Innovation Centre for Quantum Matter
- Computational Materials Sciences Program - US Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0020145]
- Ministry of Science and Technology, R.O.C. [MOST 1032119-M-009-0 03-MY3]
- Centre for Interdisciplinary Science of National Chiao Tung University
- Japan Society for the Promotion of Science (JSPS)
- JSPS [25106003]
- Ministry of Education, Culture, Sports, Science and Technology in Japan (MEXT) [12024046]
- [JP17H06094]
This study reveals the significant impact of dislocations on local polarization, forming local polarization inhomogeneity, and provides a strategy to manipulate the magnitude and orientation of local polarization through defect engineering.
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 similar to 100 mu Ccm(-2) induced by a single a[001] dislocation in the PbZr0.2Ti0.8O3/SrTiO3 film/substrate heterostructure, the tensile region (similar to 120 mu Ccm(-2)) and the compressive strain region (similar to 21 mu Ccm(-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. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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