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, Gang Liu*

*此作品的通讯作者

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摘要

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.

源语言英语
文章编号2444
期刊Nature Communications
13
1
DOI
出版状态已出版 - 12月 2022

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Yang, L., Huang, H., Xi, Z., Zheng, L., Xu, S., Tian, G., Zhai, Y., Guo, F., Kong, L., Wang, Y., Lü, W., Yuan, L., Zhao, M., Zheng, H., & Liu, G. (2022). Simultaneously achieving giant piezoelectricity and record coercive field enhancement in relaxor-based ferroelectric crystals. Nature Communications, 13(1), 文章 2444. https://doi.org/10.1038/s41467-022-29962-6