Giant piezoelectricity in oxide thin films with nanopillar structure
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- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 138634 Singapore.
- Department of Materials Science and Engineering, National University of Singapore, 117575 Singapore.
- Institute of High Performance Computing, A*STAR (Agency for Science, Technology and Research), 138632 Singapore.
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA.
- Department of Materials Science and Engineering, National University of Singapore, 117575 Singapore.; Singapore Synchrotron Light Source (SSLS), National University of Singapore, 117603 Singapore.
- Singapore Synchrotron Light Source (SSLS), National University of Singapore, 117603 Singapore.
- Department of Physics, National University of Singapore, 117551 Singapore.
- Singapore Synchrotron Light Source (SSLS), National University of Singapore, 117603 Singapore.; Department of Physics, National University of Singapore, 117551 Singapore.
- Department of Physics and Astronomy, University of Missouri, Columbia, MO 65211, USA.
High-performance piezoelectric materials are critical components for electromechanical sensors and actuators. For more than 60 years, the main strategy for obtaining large piezoelectric response has been to construct multiphase boundaries, where nanoscale domains with local structural and polar heterogeneity are formed, by tuning complex chemical compositions. We used a different strategy to emulate such local heterogeneity by forming nanopillar regions in perovskite oxide thin films. We obtained a giant effective piezoelectric coefficient of ~1098 picometers per volt with a high Curie temperature of ~450°C. Our lead-free composition of sodium-deficient sodium niobate contains only three elements (Na, Nb, and O). The formation of local heterogeneity with nanopillars in the perovskite structure could be the basis for a general approach to designing and optimizing various functional materials.
- Research Organization:
- Univ. of Missouri, Columbia, MO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- SC0019114
- OSTI ID:
- 1803566
- Journal Information:
- Science, Vol. 369, Issue 6501; ISSN 0036-8075
- Publisher:
- AAAS
- Country of Publication:
- United States
- Language:
- English
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