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Meeting MS&T21: Materials Science & Technology
Symposium Journal of the American Ceramic Society Awards Symposium
Presentation Title Domain Walls in Ferroelectrics
Author(s) Sukriti Mantri, John Daniels
On-Site Speaker (Planned) Sukriti Mantri
Abstract Scope Domain-walls in ferroelectrics have in past been predicted using analytical calculations wherein equations were solved for planes for which resolved strain from either side of domain-wall was equal on domain-wall plane. This method provides no information on the relative-energetics of non-ideal domain-walls. Here, we study the residual strain on every possible plane normal between two domains. We predict the permissible strain-free domain-walls along with the variation in residual domain-wall strain for non-permissible domain walls in ferroelectric symmetries of tetragonal, rhombohedral, orthorhombic and monoclinic(MA). It was found that the domain-walls in tetragonal and rhombohedral symmetry are fixed; Orthorhombic and monoclinic symmetries, in addition to fixed domain-walls, also have strange domain-walls(S-walls) that change their crystallographic plane as a function of distortion. The domains whose domain walls cannot be solved using analytical methods(R-walls), were shown to have almost permissible(negligible-strain) domain-walls. Changes in permissible domain wall orientation due to external stimuli was also predicted.
Proceedings Inclusion? Undecided


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