The ferroelectric phase transition in Dion-Jacobson layered perovskites

DOI

Several distinct families of layered perovskites have been shown experimentally to display ferroelectricity. The most recent of these is the Dion-Jacobson (DJ) family, typified by compositions such as CsBiNb2O7, which has now been shown to be ferroelectric with a TC of ~ 1033 C. Simultaneously, theoretical studies have suggested that ferroelectricity in the DJ family arises from a 'trilinear coupling', whereby two non-polar lattice modes interact in such a way to cooperate with a third, polar mode. Both these studies were prompted by our own earlier work, which predicted ferroelectricity in CsBiNb2O7 based on a crystallographic study at ISIS. Unfortunately, our earlier VT study only extended to 900 C; with the benefit of hindsight(!) it is clear that a further study is prompted in order to clarify the exact nature of the ferro-paraelectric transition in this and related compounds.

Identifier
DOI https://doi.org/10.5286/ISIS.E.73946131
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/73946131
Provenance
Creator Dr Rebecca Clulow; Dr Kevin Knight; Ms Charlotte Dixon; Professor Phil Lightfoot; Dr Finlay Morrison; Dr Lucy Clark
Publisher ISIS Neutron and Muon Source
Publication Year 2019
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Chemistry; Natural Sciences; Physics
Temporal Coverage Begin 2016-02-28T00:00:00Z
Temporal Coverage End 2016-03-02T00:00:00Z