Nonlinearity in the High-Electric-Field Piezoelectricity of Epitaxial BiFeO3 on SrTiO3
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 10, 2012
- Accession Number
- ADA599671
Entities
People
- Chang-Beom Eom
- Eric M. Dufresne
- Ji Y. Jo
- Osami Sakata
- Paul G. Evans
- Pice Chen
- Rebecca J. Sichel-tissot
- Ryan T. Smith
- Seung-hyub Baek
- Wittawat Saenrang
Organizations
- Argonne National Laboratory