ISIS Neutron and Muon Source Data Journal

The ferroelectric phase transition in Dion-Jacobson layered perovskites

Abstract: 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.

Principal Investigator: Professor Philip Lightfoot
Experimenter: Dr Rebecca Clulow
Local Contact: Dr Kevin Knight
Experimenter: Ms Charlotte Dixon
Experimenter: Professor Finlay Morrison
Experimenter: Dr Lucy Clark
Local Contact: Dr Kevin Knight

DOI: 10.5286/ISIS.E.RB1520003

ISIS Experiment Number: RB1520003

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
Select the data format above to find out more about it.

Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Philip Lightfoot et al; (2016): The ferroelectric phase transition in Dion-Jacobson layered perovskites, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1520003

Data is released under the CC-BY-4.0 license.