ISIS Neutron and Muon Source Data Journal

High resolution measurement of mode Grueneisen parameters in the negative thermal expansion material ZrW2O8

Abstract: ZrW2O8 is the classic example of a material exhibiting negative thermal expansion (NTE), i.e. lattice shrinkage on warming. The origin of this behaviour has been controversial for a long time, but is widely believed to be intimately linked to the lattice dynamics. Recent ab-inito studies have suggested that there is no single phonon mode that is responsible for the NTE, rather a collection of low energy modes all contribute. These same ab-initio studies have been used to explain the origin of negative hydration expansion (lattice shrinkage on intercalation of water) in ZrW2O8. The aim of this proposal is to verify the calculations directly using single crystal inelastic neutron scattering to measure how all of the low energy modes shift as a function of temperature, a key prediction of the theoretical work.

Principal Investigator: Dr Russell Ewings
Local Contact: Dr Franz Demmel
Experimenter: Dr Toby Perring

DOI: 10.5286/ISIS.E.RB1910592

ISIS Experiment Number: RB1910592

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:
Dr Russell Ewings et al; (2019): High resolution measurement of mode Grueneisen parameters in the negative thermal expansion material ZrW2O8, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1910592

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