ISIS Neutron and Muon Source Data Journal

Quantum critical points in relaxor-type ferroelectric tetragonal tungsten bronzes

Abstract: Quantum Critical Points in ferroelectrics, where the transition temperature is very near absolute zero, are of significant current interest, with publications in Nature-family journals, Physical Review Letters, and other high-impact journals. However, only a few crystal structures, emphasizing perovskites, have been measured via most techniques. Potassium lithium tantalate (KLT) has a reported transition at T=7K, but it remains controversial and its cryogenic structure would be clarified by neutron spectroscopy. KLT is very unusual in other ways: Of several hundred tetragonal tungsten bronzes, only two have the small c-axis triangular sites occupied. This makes it a Li-ion conductor, and we have already established that it is a relaxor ferroelectric, meaning that its apparent transition temperature depends strongly upon probe frequency.

Principal Investigator: Professor James Scott
Experimenter: Miss Rebecca Mary Smith
Experimenter: Dr Jonathan Gardner
Local Contact: Dr Alexandra Gibbs
Experimenter: Mr Grant William Howieson

DOI: 10.5286/ISIS.E.RB1810105

ISIS Experiment Number: RB1810105

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 James Scott et al; (2018): Quantum critical points in relaxor-type ferroelectric tetragonal tungsten bronzes, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1810105

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