About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Computational Thermodynamics and Kinetics
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Presentation Title |
Strain Engineering of Ferroelectric Domains in Epitaxially Grown Barium Zirconate Titanate – Barium Calcium Titanate (BZT-xBCT) Films near Morphotropic Phase Boundary Composition: Phase-field Simulations and Experimental Realization |
Author(s) |
Vaishnavi S M, Soumya Bandyopadhyay, Sabarigresan Murugan, Saswata Bhattacharya, Ranjith Ramadurai |
On-Site Speaker (Planned) |
Ranjith Ramadurai |
Abstract Scope |
Tuning epitaxial misfit strain is an effective strategy to tailor ferroelectric properties of epitaxially grown films. Since bulk BZT-xBCT solid solution exhibit enhanced ferroelectric and piezoelectric properties at room temperature at the morphotropic phase boundary (MPB), with a view to strain-tuning the electromechanical response of this lead-free ferroelectric system, we investigate the role of epitaxial misfit on ferroelectric domain evolution in BZT-xBCT films near the MPB composition using a combination of phase-field simulations and piezo-response force microscopy experiments. The change in biaxial strain from compressive (Ɛ=-0.01) to tensile (Ɛ =+0.01) leads to significant change in the simulated domain structure from tetragonal fractal-like domains to orthorhombic checker-board like domain pattern. To realize such changes in domain evolution, epitaxial films of the same thickness were grown by pulsed laser ablation maintaining similar strain conditions and Piezo-response force microscopy of these films reveal very similar patterns as predicted by the phase-field simulations. |
Proceedings Inclusion? |
Planned: |
Keywords |
Thin Films and Interfaces, Modeling and Simulation, Other |