Nonlinearity in the high-electric-field piezoelectricity of epitaxial BiFeO3 on SrTiO3

Title
Nonlinearity in the high-electric-field piezoelectricity of epitaxial BiFeO3 on SrTiO3
Authors
Chen, P.Sichel-Tissot, R.J.Jo, J.Y.Smith, R.T.백승협Saenrang, W.Chang-Beom EomSakata, O.Dufresne, E.M.Evans, P.G.
Issue Date
2012-02
Publisher
Applied physics letters
Citation
VOL 100, NO 6, 062906-1-062906-4
Abstract
The piezoelectricity of a multiferroic BiFeO3 thin film deviates from its low-field linear response in electric fields higher than 150 MV/m. Time-resolved synchrotron x-ray microdiffraction reveals a low-field piezoelectric coefficient of 55 pm/V and a steeper increase in strain at higher fields, with an effective piezoelectric coefficient of 86 pm/V. The strain reaches 2% at 281 MV/m, a factor of 1.3 higher than expected based on an extrapolation from low fields. The peak intensity of the BiFeO3 (002) Bragg reflection decreases throughout the high-electric-field regime, accompanied by increased diffuse scattering, consistent with lattice softening lattice near a field-induced phase transition.
URI
http://pubs.kist.re.kr/handle/201004/44236
ISSN
00036951
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KIST Publication > Article
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