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Title: Orientation-dependent piezoelectric properties in lead-free epitaxial 0.5BaZr{sub 0.2}Ti{sub 0.8}O{sub 3}-0.5Ba{sub 0.7}Ca{sub 0.3}TiO{sub 3} thin films

Orientation-engineered 0.5BaZr{sub 0.2}Ti{sub 0.8}O{sub 3}-0.5Ba{sub 0.7}Ca{sub 0.3}TiO{sub 3} (BZT-BCT) thin films were deposited on La{sub 0.7}Sr{sub 0.3}MnO{sub 3}-coated SrTiO{sub 3} single-crystalline (001), (110), and (111) substrates by off-axis radio-frequency magnetron sputtering. X-ray diffraction confirmed a highly epitaxial growth of all the as-deposited films. It is believed the strong orientation dependence of ferroelectric and piezoelectric properties on the films is attributed to the relative alignment of crystallites and spontaneous polarization vector. The optimal ferroelectric response lies in the [001] direction, whereas a comparatively large effective piezoelectric coefficient d{sub 33,eff} of 100.1 ± 5 pm/V was attained in [111] BZT-BCT thin film, suggesting its potential application for high-performance lead-free piezoelectric devices.
Authors:
 [1] ;  [2] ; ;  [1] ;  [3]
  1. School of Materials Science and Engineering, The University of New South Wales, Sydney, NSW 2052 (Australia)
  2. (China)
  3. School of Science, Northwestern Polytechnical University, Xi'an 710072 (China)
Publication Date:
OSTI Identifier:
22217960
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 12; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; BARIUM COMPOUNDS; CALCIUM COMPOUNDS; DEPOSITS; EPITAXY; FERROELECTRIC MATERIALS; MAGNETRONS; MONOCRYSTALS; ORIENTATION; PIEZOELECTRICITY; POLARIZATION; RADIOWAVE RADIATION; SPUTTERING; STRONTIUM TITANATES; SUBSTRATES; TETRAGONAL LATTICES; THIN FILMS; X-RAY DIFFRACTION