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

Yan Chen; Chi-Man Wong; Hao Deng; Hei-Man Yau; Danyang Wang; Zhibo Yan; Haosu Luo; Helen L. W. Chan; Jiyan Dai

doi:10.1063/1.4914936

AIP Advances (Mar 2015)

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

Yan Chen,
Chi-Man Wong,
Hao Deng,
Hei-Man Yau,
Danyang Wang,
Zhibo Yan,
Haosu Luo,
Helen L. W. Chan,
Jiyan Dai

Affiliations

Yan Chen: The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China
Chi-Man Wong: The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China
Hao Deng: Information Materials and Devices Research Center, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, 201800, China
Hei-Man Yau: The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China
Danyang Wang: School of Materials Science and Engineering, The University of New South Wales, Kensington, NSW 2052, Australia
Zhibo Yan: Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China
Haosu Luo: Information Materials and Devices Research Center, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, 201800, China
Helen L. W. Chan: Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China
Jiyan Dai: The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China

DOI: https://doi.org/10.1063/1.4914936
Journal volume & issue: Vol. 5, no. 3
pp. 037117 – 037117-6

Abstract

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In this work, ferroelectric domain structures of -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.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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