AI Article Synopsis
- The study investigates the source of large electrostrain in BiFeO_{3}-based ceramics using direct structural evidence and simulations.
- Advanced characterization techniques reveal multiple nanoscale local symmetries, mainly tetragonal or orthorhombic, contributing to overall polarization.
- Phase-field simulations support these findings, suggesting a new approach for creating high-performance, lead-free ceramics suitable for high-strain actuators.
Article Abstract
For the first time, the origin of large electrostrain in pseudocubic BiFeO_{3}-based ceramics is verified with direct structural evidence backed by appropriate simulations. We employ advanced structural and microstructural characterizations of BiFeO_{3}-based ceramics that exhibit large electrostrain (>0.4%) to reveal the existence of multiple, nanoscale local symmetries, dominantly tetragonal or orthorhombic, which have a common, averaged direction of polarization over larger, meso- or microscale regions. Phase-field simulations confirm the existence of local nanoscale symmetries, thereby providing a new vision for designing high-performance lead-free ceramics for high-strain actuators.
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| http://dx.doi.org/10.1103/PhysRevLett.130.076801 | DOI Listing |
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