Nonlinear piezoelectricity in epitaxial ferroelectrics at high electric fields.
Nonlinear effects in the coupling of polarization with elastic strain have been predicted to occur in ferroelectric materials subjected to high electric fields. Such predictions are tested here for a PbZr0.2Ti0.8O3 ferroelectric thin film at electric fields in the range of several hundred MV/m and strains reaching up to 2.7%. The piezoelectric strain exceeds predictions based on constant piezoelectric coefficients at electric fields from approximately 200 to 400 MV/m, which is consistent with a nonlinear effect predicted to occur at corresponding piezoelectric distortions.
Grigoriev
Alexei
A
Department of Materials Science and Engineering, University of Wisconsin, Madison, Wisconsin 53706, USA.
Sichel
Rebecca
R
Lee
Ho Nyung
HN
Landahl
Eric C
EC
Adams
Bernhard
B
Dufresne
Eric M
EM
Evans
Paul G
PG