Room temperature surface piezoelectricity in SrTiO3 ceramics via piezoresponse force microscopy
arXiv:0810.3672 · doi:10.1063/1.3037220
Abstract
SrTiO3 ceramics are investigated by piezoresponse force microscopy. Piezoelectric contrast is observed on polished surfaces in both vertical and lateral regimes and depends on the grain orientation varying in both sign (polarization direction) and amplitude. The observed contrast is attested to the surface piezoelectricity due to flexoelectric effect (strain gradient-induced polarization) caused by the surface relaxation. The estimated flexoelectric coefficient is approximately one order of magnitude smaller as compared to those recently measured in SrTiO3 single crystals. The observed enhancement of piezoresponse signal at the grain boundaries is explained by the dipole moments associated with inhomogeneous distribution of oxygen vacancies.
References in corpus (1)
Cited by in corpus (4)
- Nonlinear dynamics of polar regions in paraelectric phase of (Ba1-x,Srx)TiO3 ceramics
- Low-symmetry monoclinic phase stabilized by oxygen octahedra rotations in thin strained EuxSr1-xTiO3 films
- Flexocoupling impact on the kinetics of polarization reversal
- Flexoelectricity induced spatially modulated phases in ferroics and liquid crystals (Author review)