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Página principal > Artículos > Artículos publicados > Flexoelectricity in antiferroelectrics |
Fecha: | 2018 |
Resumen: | Flexoelectricity (coupling between polarization and strain gradients) is a property of all dielectric materials that has been theoretically known for decades, but only relatively recently it has begun to attract experimental attention. As a consequence, there are still entire families of materials whose flexoelectric performance is unknown. Such is the case of antiferroelectrics: materials with an antiparallel but switchable arrangement of dipoles. These materials are expected to be flexoelectrically relevant because it has been hypothesised that flexoelectricity could be linked to the origin of their antiferroelectricity. In this work, we have measured the flexoelectricity of two different antiferroelectrics (PbZrO and AgNbO) as a function of temperature, up to and beyond their Curie temperature. Although their flexocoupling shows a sharp peak at the antiferroelectric phase transition, neither flexoelectricity nor the flexocoupling coefficients are anomalously high, suggesting that it is unlikely that flexoelectricity causes antiferroelectricity. |
Ayudas: | Ministerio de Economía y Competitividad SEV-2013-0295 Ministerio de Economía y Competitividad MAT2016-77100-C2-1-P European Commission 308023 Ministerio de Economía y Competitividad BES-2016-077392 |
Derechos: | Tots els drets reservats. |
Lengua: | Anglès |
Documento: | Article ; recerca ; Versió acceptada per publicar |
Materia: | Antiferroelectric phase transition ; Antiferroelectrics ; Flexoelectric ; Flexoelectricity ; Polarization and strains ; Switchable |
Publicado en: | Applied physics letters, Vol. 113, Issue 13 (September 2018) , art. 132903, ISSN 1077-3118 |
Postprint 17 p, 1.1 MB |