Simultaneously achieving giant piezoelectricity and record coercive field enhancement in relaxor-based ferroelectric crystals

Liya Yang, Houbing Huang, Zengzhe Xi, Limei Zheng (), Shiqi Xu, Gang Tian, Yuzhi Zhai, Feifei Guo, Lingping Kong, Yonggang Wang, Weiming Lü (), Long Yuan, Minglei Zhao, Haiwu Zheng and Gang Liu ()
Additional contact information
Liya Yang: Shandong University
Houbing Huang: Beijing Institute of Technology
Zengzhe Xi: Xi’an Technological University
Limei Zheng: Shandong University
Shiqi Xu: Beijing Institute of Technology
Gang Tian: Shandong University
Yuzhi Zhai: Shandong University
Feifei Guo: Xi’an Technological University
Lingping Kong: Center for High Pressure Science and Technology Advanced Research
Yonggang Wang: Center for High Pressure Science and Technology Advanced Research
Weiming Lü: University of Jinan
Long Yuan: Jilin Normal University
Minglei Zhao: Shandong University
Haiwu Zheng: Henan University
Gang Liu: Center for High Pressure Science and Technology Advanced Research

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract A large coercive field (EC) and ultrahigh piezoelectricity are essential for ferroelectrics used in high-drive electromechanical applications. The discovery of relaxor-PbTiO3 crystals is a recent breakthrough; they currently afford the highest piezoelectricity, but usually with a low EC. Such performance deterioration occurs because high piezoelectricity is interlinked with an easy polarization rotation, subsequently favoring a dipole switch under small fields. Therefore, the search for ferroelectrics with both a large EC and ultrahigh piezoelectricity has become an imminent challenge. Herein, ternary Pb(Sc1/2Nb1/2)O3–Pb(Mg1/3Nb2/3)O3–PbTiO3 crystals are reported, wherein the dispersed local heterogeneity comprises abundant tetragonal phases, affording a EC of 8.2 kV/cm (greater than that of Pb(Mg1/3Nb2/3)O3–PbTiO3 by a factor of three) and ultrahigh piezoelectricity (d33 = 2630 pC/N; d15 = 490 pC/N). The observed EC enhancement is the largest reported for ultrahigh-piezoelectric materials, providing a simple, practical, and universal route for improving functionalities in ferroelectrics with an atomic-level understanding.

Date: 2022
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DOI: 10.1038/s41467-022-29962-6

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