Role of Reversible Phase Transformation for Strong Piezoelectric Performance at the Morphotropic Phase Boundary

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Hui Liu
  • Jun Chen
  • Houbing Huang
  • Longlong Fan
  • Zhao Pan
  • Jinxia Deng
  • Long-Qing Chen
  • Xianran Xing

Detail(s)

Original languageEnglish
Article number055501
Journal / PublicationPhysical Review Letters
Volume120
Issue number5
Online published29 Jan 2018
Publication statusPublished - 2 Feb 2018
Externally publishedYes

Abstract

A functional material with coexisting energetically equivalent phases often exhibits extraordinary properties such as piezoelectricity, ferromagnetism, and ferroelasticity, which is simultaneously accompanied by field-driven reversible phase transformation. The study on the interplay between such phase transformation and the performance is of great importance. Here, we have experimentally revealed the important role of field-driven reversible phase transformation in achieving enhanced electromechanical properties using in situ high-energy synchrotron x-ray diffraction combined with 2D geometry scattering technology, which can establish a comprehensive picture of piezoelectric-related microstructural evolution. High-throughput experiments on various Pb/Bi-based perovskite piezoelectric systems suggest that reversible phase transformation can be triggered by an electric field at the morphotropic phase boundary and the piezoelectric performance is highly related to the tendency of electric-field-driven phase transformation. A strong tendency of phase transformation driven by an electric field generates peak piezoelectric response. Further, phase-field modeling reveals that the polarization alignment and the piezoelectric response can be much enhanced by the electric-field-driven phase transformation. The proposed mechanism will be helpful to design and optimize the new piezoelectrics, ferromagnetics, or other related functional materials.

Citation Format(s)

Role of Reversible Phase Transformation for Strong Piezoelectric Performance at the Morphotropic Phase Boundary. / Liu, Hui; Chen, Jun; Huang, Houbing et al.
In: Physical Review Letters, Vol. 120, No. 5, 055501, 02.02.2018.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review