Ultrahigh electromechanical response in (1-x)(Na0.5Bi0.5)TiO3-xBaTiO3 single-crystals via polarization extension

被引：59

作者：

Ge, Wenwei ^{[1
]}

Luo, Chengtao ^{[1
]}

Zhang, Qinhui ^{[2
]}

Devreugd, Chris P. ^{[1
]}

Ren, Yang ^{[3
]}

Li, Jiefang ^{[1
]}

Luo, Haosu ^{[2
]}

Viehland, D. ^{[1
]}

机构：

[1] Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA

[2] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 201800, Peoples R China

[3] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2012年 / 111卷 / 09期

基金：

美国国家科学基金会;

关键词：

PIEZOELECTRIC PROPERTIES; ELECTROSTRICTIVE STRAIN; PHASE-TRANSITIONS; MATERIALS SCIENCE; NA0.5BI0.5TIO3; ANISOTROPY; CERAMICS; ROTATION; BEHAVIOR; BATIO3;

D O I：

10.1063/1.4709619

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The dielectric, ferroelectric, and electric field-induced strain response of [001]-and [101]-oriented 0.944Na(0.5)Bi(0.5)TiO(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 degrees 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. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4709619]

引用

页数：8

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