Ultrahigh electromechanical response from competing ferroic orders

Baichen Lin, Khuong Phuong Ong, Tiannan Yang, Qibin Zeng, Hui Kim Hui, Zhen Ye, Celine Sim, Zhihao Yen, Ping Yang, Yanxin Dou, Xiaolong Li, Xingyu Gao, Chee Kiang Ivan Tan, Zhi Shiuh Lim, Shengwei Zeng, Tiancheng Luo, Jinlong Xu, Xin Tong, Patrick Wen Feng Li, Minqin Ren, Kaiyang Zeng, Chengliang Sun, Seeram Ramakrishna, Mark B. H. Breese, Chris Boothroyd, Chengkuo Lee, David J. Singh, Yeng Ming Lam () and Huajun Liu ()
Additional contact information
Baichen Lin: Agency for Science, Technology and Research (A*STAR)
Khuong Phuong Ong: Agency for Science, Technology and Research (A*STAR)
Tiannan Yang: Shanghai Jiao Tong University
Qibin Zeng: Agency for Science, Technology and Research (A*STAR)
Hui Kim Hui: Agency for Science, Technology and Research (A*STAR)
Zhen Ye: Agency for Science, Technology and Research (A*STAR)
Celine Sim: Agency for Science, Technology and Research (A*STAR)
Zhihao Yen: Nanyang Technological University
Ping Yang: National University of Singapore
Yanxin Dou: National University of Singapore
Xiaolong Li: Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Advanced Research Institute, Chinese Academy of Sciences
Xingyu Gao: Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Advanced Research Institute, Chinese Academy of Sciences
Chee Kiang Ivan Tan: Agency for Science, Technology and Research (A*STAR)
Zhi Shiuh Lim: Agency for Science, Technology and Research (A*STAR)
Shengwei Zeng: Agency for Science, Technology and Research (A*STAR)
Tiancheng Luo: Agency for Science, Technology and Research (A*STAR)
Jinlong Xu: Agency for Science, Technology and Research (A*STAR)
Xin Tong: Agency for Science, Technology and Research (A*STAR)
Patrick Wen Feng Li: Nanyang Technological University
Minqin Ren: National University of Singapore
Kaiyang Zeng: National University of Singapore
Chengliang Sun: Wuhan University
Seeram Ramakrishna: National University of Singapore
Mark B. H. Breese: National University of Singapore
Chris Boothroyd: Nanyang Technological University
Chengkuo Lee: National University of Singapore
David J. Singh: University of Missouri
Yeng Ming Lam: Nanyang Technological University
Huajun Liu: Agency for Science, Technology and Research (A*STAR)

Nature, 2024, vol. 633, issue 8031, 798-803

Abstract: Abstract Materials with electromechanical coupling are essential for transducers and acoustic devices as reversible converters between mechanical and electrical energy1–6. High electromechanical responses are typically found in materials with strong structural instabilities, conventionally achieved by two strategies—morphotropic phase boundaries7 and nanoscale structural heterogeneity8. Here we demonstrate a different strategy to accomplish ultrahigh electromechanical response by inducing extreme structural instability from competing antiferroelectric and ferroelectric orders. Guided by the phase diagram and theoretical calculations, we designed the coexistence of antiferroelectric orthorhombic and ferroelectric rhombohedral phases in sodium niobate thin films. These films show effective piezoelectric coefficients above 5,000 pm V−1 because of electric-field-induced antiferroelectric–ferroelectric phase transitions. Our results provide a general approach to design and exploit antiferroelectric materials for electromechanical devices.

Date: 2024
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DOI: 10.1038/s41586-024-07917-9

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