ISIS Neutron and Muon Source Data Journal

Lattice dynamics in the giant barocaloric Ammonium Sulfate

Abstract: Given the challenges in providing efficient and non-harmful refrigeration, it is timely to study barocaloric systems, which offer cooling power via the application of pressure, something which is far more trivial to do than applying a magnetic field as required for magnetocalorics. The majority of caloric materials investigated so far have been based on expensive and relatively scarce rare-earths metals. Ammonium sulfate, by contrast, is widely and cheaply commercially available. It has been demonstrated that small changes in hydrostatic pressure drive giant inverse barocaloric effects near the ferroelectric phase transition. It is therefore our aim to investigate the phonon dispersion in this material near the transition to gain insight into the origin of the barocaloric effect. Successful measurements would be extended to applying hydrostatic pressure in the future.

Principal Investigator: Dr Helen Walker
Experimenter: Mr Guanqun Cai
Experimenter: Mr Shurong Yuan
Experimenter: Dr David Voneshen
Experimenter: Dr Anthony Phillips
Experimenter: Dr Richard Dixey
Experimenter: Miss Bernet Meijer

DOI: 10.5286/ISIS.E.RB1820305

ISIS Experiment Number: RB1820305

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 Helen Walker et al; (2018): Lattice dynamics in the giant barocaloric Ammonium Sulfate, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1820305

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