Ultrahigh electromechanical response in (1-x)(Na 0.5Bi 0.5)TiO 3-xBaTiO 3 single-crystals via polarization extension

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

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Author(s)

  • Wenwei Ge
  • Chengtao Luo
  • Qinhui Zhang
  • Chris P. Devreugd
  • Jiefang Li
  • Haosu Luo
  • D. Viehland

Detail(s)

Original languageEnglish
Article number093508
Journal / PublicationJournal of Applied Physics
Volume111
Issue number9
Publication statusPublished - 1 May 2012
Externally publishedYes

Abstract

The dielectric, ferroelectric, and electric field-induced strain response of [001]-and [101]-oriented 0.944Na 0.5Bi 0.5TiO 3-0.056BaTiO 3 (0.944NBT-0.056BT) single crystals were investigated as a function of temperature and dc bias (E). An ultrahigh electromechanical response with large amplitude longitudinal piezoelectric coefficients as high as d 33=2500 pm/V was found in [001] PC oriented 0.944NBT-0.056BT single crystals near a depolarization temperature of T d=130 °C. In-situ XRD revealed that the enhanced piezoelectric properties resulted from a polarization extension between a polar pseudocubic phase with a slight tetragonal (P4bm) distortion and a polar tetragonal one with a large tetragonal distortion of c/a =1.02. Our findings indicate a potential approach to high performance lead-free piezoelectrics, via polarization extension. © 2012 American Institute of Physics.

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Citation Format(s)

Ultrahigh electromechanical response in (1-x)(Na 0.5Bi 0.5)TiO 3-xBaTiO 3 single-crystals via polarization extension. / Ge, Wenwei; Luo, Chengtao; Zhang, Qinhui et al.
In: Journal of Applied Physics, Vol. 111, No. 9, 093508, 01.05.2012.

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