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Title: Ferroelectric domain structures in <001>-oriented K{sub 0.15}Na{sub 0.85}NbO{sub 3} lead-free single crystal

In this work, ferroelectric domain structures of <001 >-oriented K{sub 0.15}Na{sub 0.85}NbO{sub 3} 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{sup +}a{sup +}c{sup −} tilting of oxygen octahedral in the perovskite structure. The piezoresponse of domains and in-situ poling responses of K{sub 0.15}Na{sub 0.85}NbO{sub 3} crystal are observed by piezoresponse force microscopy (PFM), and the results assure its good ferroelectric properties.
Authors:
; ; ;  [1] ;  [2] ; ;  [3] ;  [4] ; ;  [5]
  1. The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen (China)
  2. (China)
  3. Information Materials and Devices Research Center, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, 201800 (China)
  4. School of Materials Science and Engineering, The University of New South Wales, Kensington, NSW 2052 (Australia)
  5. Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong (China)
Publication Date:
OSTI Identifier:
22454473
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 3; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DENSITY; DOMAIN STRUCTURE; ELECTRON DIFFRACTION; FERROELECTRIC MATERIALS; MONOCRYSTALS; OXYGEN; PEROVSKITE; SUPERLATTICES; TRANSMISSION ELECTRON MICROSCOPY