Proper Ferroelectricity in the Dion–Jacobson Material CsBi2Ti2NbO10: Experiment and Theory
Source abstract
Abstract
High Resolution Image Download MS PowerPoint Slide A diverse range of materials and properties are exhibited by layered perovskites. We report on the synthesis, characterization, and computational investigation of a new ferroelectric—CsBi 2 Ti 2 NbO 10 —an n = 3 member of the Dion–Jacobson (DJ) family. Structural studies using variable-temperature neutron powder diffraction indicate that a combination of octahedral rotations and polar displacements result in the polar structure. Density functional theory calculations reveal that the wider perovskite blocks in CsBi 2 Ti 2 NbO 0 stabilize proper ferroelectricity, in contrast to the hybrid-improper ferroelectricity reported for all other DJ phases. Our results raise the possibility of a new class of proper ferroelectric materials analogous to the well-known Aurivillius phases.
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Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Multiferroics and related materials · Microwave Dielectric Ceramics Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Physical Sciences, Ingram Building, University of Kent, Canterbury, Kent, CT2 7NH, U.K.
Université de Liège, Institut de Physique B5a, Allée du 6 Août, 17, B-4000 Sart Tilman, Belgium
Department of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States
Department of Materials Sciences and Engineering, University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S1 3JD, U.K.
Funding
Nuclear Decommissioning Authority · Royal Academy of Engineering · Welch Foundation · Division of Materials Research · Royal Society
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