The ferroelectric phase transition in Dion-Jacobson layered perovskites - continuation

DOI

Ferroelectricity in the Dion-Jacobson (DJ) family of layered perovskites arises from a 'trilinear coupling', whereby two non-polar lattice modes interact in such a way to cooperate with a 3rd, polar mode. These systems are gaining in interest as the predicted (and now observed) polariations are typically larger than those in the related families of layered perovskites. In a previous VT HRPD study (RB1520003) we carried out detaled measurements of the structural evolution of two members of this family, CsLaNb2O7 and CsBi0.6La0.4Nb2O7, at sub-ambient and above-ambient, respectively. The aim of the present proposal is to complete our analysis of this system by collecting data on the two end-member compositions CsLaNb2O7 and CsBiNb2O7 above RT, and through the ferroelectric-paraelectric transition. The results are urgently required as a comparision to a recent synchrotron study of CsLaNb2O7

Identifier
DOI https://doi.org/10.5286/ISIS.E.82352271
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/82352271
Provenance
Creator Dr Alexandra Gibbs; Professor Phil Lightfoot; Dr Lucy Clark; Ms Charlotte Dixon; Dr Rebecca Clulow
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 2016-09-24T07:00:00Z
Temporal Coverage End 2016-09-27T07:00:00Z