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Structural observation of piezoelectric inhomogeneity in a mixed-orientation Na0.5Bi0.5TiO3 perovskite thin film

Carbone, D. LU ; Pateras, A. I. ; Bussone, G. ; Evans, P. G. ; Cornelius, T. W. ; Bousquet, M. ; Boulle, A. ; Gautier, B. and Duclère, J. R. (2014) In Applied Physics Letters 105(24).
Abstract

Thin films of the lead-free ferroelectric Na0.5Bi0.5TiO3 grown on thin-film Pt electrodes supported by SrTiO3 substrates have a complex microstructure consisting of crystalline grains with three distinct major crystallographic orientations. The piezoelectric response measured in spatially separated sub-micron grains using time-resolved synchrotron x-ray microdiffraction is highly inhomogeneous even among grains sharing the same major orientation. The piezoelectric coefficient d33 varies by nearly a factor of two in a series of areas sharing the 〈001〉 orientation. The piezoelectric inhomogeneity is linked to the peculiar microstructure of the film, arising from local variations in... (More)

Thin films of the lead-free ferroelectric Na0.5Bi0.5TiO3 grown on thin-film Pt electrodes supported by SrTiO3 substrates have a complex microstructure consisting of crystalline grains with three distinct major crystallographic orientations. The piezoelectric response measured in spatially separated sub-micron grains using time-resolved synchrotron x-ray microdiffraction is highly inhomogeneous even among grains sharing the same major orientation. The piezoelectric coefficient d33 varies by nearly a factor of two in a series of areas sharing the 〈001〉 orientation. The piezoelectric inhomogeneity is linked to the peculiar microstructure of the film, arising from local variations in the stress imposed by surrounding grains with different crystallographic orientations and differing directions of the ferroelectric remnant polarization. A systematic nonlinearity of the piezoelectric strain is observed in applied electric fields with small magnitudes in all regions, consistent with the coexistence of domains of differing polarization direction at zero applied electric field.

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author
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publishing date
type
Contribution to journal
publication status
published
in
Applied Physics Letters
volume
105
issue
24
article number
242901
publisher
American Institute of Physics (AIP)
external identifiers
  • scopus:84918811593
ISSN
0003-6951
DOI
10.1063/1.4904458
language
English
LU publication?
no
additional info
Publisher Copyright: © 2014 AIP Publishing LLC.
id
88047f8c-3f7f-4d6b-b8e4-2a58fdba6e46
date added to LUP
2021-12-15 11:37:52
date last changed
2022-03-11 22:17:18
@article{88047f8c-3f7f-4d6b-b8e4-2a58fdba6e46,
  abstract     = {{<p>Thin films of the lead-free ferroelectric Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> grown on thin-film Pt electrodes supported by SrTiO<sub>3</sub> substrates have a complex microstructure consisting of crystalline grains with three distinct major crystallographic orientations. The piezoelectric response measured in spatially separated sub-micron grains using time-resolved synchrotron x-ray microdiffraction is highly inhomogeneous even among grains sharing the same major orientation. The piezoelectric coefficient d<sub>33</sub> varies by nearly a factor of two in a series of areas sharing the 〈001〉 orientation. The piezoelectric inhomogeneity is linked to the peculiar microstructure of the film, arising from local variations in the stress imposed by surrounding grains with different crystallographic orientations and differing directions of the ferroelectric remnant polarization. A systematic nonlinearity of the piezoelectric strain is observed in applied electric fields with small magnitudes in all regions, consistent with the coexistence of domains of differing polarization direction at zero applied electric field.</p>}},
  author       = {{Carbone, D. and Pateras, A. I. and Bussone, G. and Evans, P. G. and Cornelius, T. W. and Bousquet, M. and Boulle, A. and Gautier, B. and Duclère, J. R.}},
  issn         = {{0003-6951}},
  language     = {{eng}},
  month        = {{12}},
  number       = {{24}},
  publisher    = {{American Institute of Physics (AIP)}},
  series       = {{Applied Physics Letters}},
  title        = {{Structural observation of piezoelectric inhomogeneity in a mixed-orientation Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> perovskite thin film}},
  url          = {{http://dx.doi.org/10.1063/1.4904458}},
  doi          = {{10.1063/1.4904458}},
  volume       = {{105}},
  year         = {{2014}},
}