| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Hume-Rothery Symposium on Thermodynamics of Microstructure Stability and Evolution
|
| Presentation Title |
Understanding Mechanical Tunability in Ba1-xSrxTiO3 Membrane by Phase-Field Simulation |
| Author(s) |
Laveeza Ahmad, Yi-De Liou, Kena Zhang, Ye Cao |
| On-Site Speaker (Planned) |
Ye Cao |
| Abstract Scope |
Ferroelectrics are key materials in microelectromechanical systems. At present, they are limited in use as conventional piezoelectrics, in which mechanical response is induced by electric fields. Evolving technology requires ferroelectrics that exhibit mechanical responses to light and mechanical tunability by strain. In this talk, we will demonstrate how to realize enhanced mechanical tunability by controlling ferroelectric domains via strain, chemical composition, and temperature. We chose Ba1-xSrxTiO3 membrane as the model system. Our results indicate that the tunability of elastic modulus is enhanced under bending, which can be attributed to the formation of vortex domain structures. In addition, strain-driven non-volatile ferroelectric domain switching is realized in Ba1-xSrxTiO3, in reminiscent of the polarization-electric field hysteresis loop. By controlling the Sr composition and temperature near the phase boundaries, this non-volatile domain switching gives rise to remarkably enhanced mechanical tunability. This research paves the way for the development of advanced strain-driven ferroic-based devices. |
| Proceedings Inclusion? |
Planned: |