We report experimental values for the flexoelectric responses of SrTiO3, KTaO3, TiO2, and YAlO3 single crystals using a three-point bending approach. We find all samples possess a linear flexoelectric response with effective short-circuit flexoelectric coefficients ∼|1-10|nC/m. Flexocoupling voltages computed from these measured effective flexoelectric coefficients are found to significantly vary across the investigated materials and refute the previous suggestions that they should be ∼|1-10| V. Importantly, we find that low dielectric constant materials can have large flexocoupling voltages exceeding nominal expectations.
ASJC Scopus subject areas
- General Materials Science
- Physics and Astronomy (miscellaneous)