Ferroelectric domain structures in <001>-oriented K0.15Na0.85NbO3 lead-free single crystal

被引：7
作者：
Chen, Yan [1 ,2 ]
Wong, Chi-Man [1 ,2 ]
Deng, Hao [3 ]
Yau, Hei-Man [1 ,2 ]
Wang, Danyang [4 ]
Yan, Zhibo [2 ]
Luo, Haosu [3 ]
Chan, Helen L. W. [2 ]
Dai, Jiyan [1 ,2 ]
机构：
[1] Hong Kong Polytech Univ, Shenzhen Res Inst, Shenzhen, Peoples R China
[2] Hong Kong Polytech Univ, Dept Appl Phys, Hong Kong, Hong Kong, Peoples R China
[3] Chinese Acad Sci, Shanghai Inst Ceram, Informat Mat & Devices Res Ctr, Shanghai 201800, Peoples R China
[4] Univ New S Wales, Sch Mat Sci & Engn, Kensington, NSW 2052, Australia
来源：
AIP ADVANCES | 2015年 / 5卷 / 03期
关键词：
FREE PIEZOELECTRIC CERAMICS; MORPHOLOGY;
D O I：
10.1063/1.4914936
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this work, ferroelectric domain structures of < 001 >-oriented K0.15Na0.85NbO3 single crystal are characterized. Transmission electron microscopy (TEM) observation revealed high-density of laminate domain structures in the crystal and the lattices of the neighboring domains are found to be twisted in a small angle. Superlattice diffraction spots of 1/2{eeo} and 1/2{ooe} in electron diffraction patterns are observed in the crystal, revealing the a(+)a(+)c(-) tilting of oxygen octahedral in the perovskite structure. The piezoresponse of domains and in-situ poling responses of K0.15Na0.85NbO3 crystal are observed by piezoresponse force microscopy (PFM), and the results assure its good ferroelectric properties. (C) 2015 Author(s).
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页数：6
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