ISIS Neutron and Muon Source Data Journal

Possible high-temperature polar phases in the [110] layered perovskites NdBaInO4 and YBaScO4

Abstract: Geometric ferroelectrics are an unusual and rare class of materials which exhibit spontaneous electrical polarisation due purely to 'geometric' effects, i.e. caused by atomic size mismatch, rather than 'electronically' driven factors. The compound LaTaO4 is one case, which is particularly unusual in showing a transition to such a state on INCREASING, rather than decreasing temperature. In this proposal we seek to characterise two new compounds, distinct from, but closely related to LaTaO4, which we believe may show a similar 'geometry-induced' electrical polarisation. The apparent phase transition of one of these, has previously been overlooked in the literature. We will use high-resolution powder neutron diffraction to ascertain whether these new materials do indeed display this unusual behaviour.

Principal Investigator: Professor Philip Lightfoot
Experimenter: Mr Alasdair Bradford
Experimenter: Miss Ceng Han
Local Contact: Dr Alexandra Gibbs
Experimenter: Miss Yuanyuan Guo

DOI: 10.5286/ISIS.E.RB1910025

ISIS Experiment Number: RB1910025

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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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; (2019): Possible high-temperature polar phases in the [110] layered perovskites NdBaInO4 and YBaScO4, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1910025

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