ISIS Neutron and Muon Source Data Journal

Phase diagram of a switchable dielectric framework near the critical point

Abstract: The family of hybrid Prussian blue analogues includes many electroactive materials, where organic cations moving within the pores of the cyanide framework cause unusual and exploitable electrical properties. Our target material, (HIm)2K[Fe(CN)6], has a large dielectric constant in its two high-temperature phases due to the rotation of imidazolium ions in its cubic pores. The transition between these two phases affects the cation dynamics drastically, but itself depends on the unit cell parameter, varying from first-order to critical or even supercritical. We propose here to study this phase transition as a function of pressure. Mapping the phase space of this system will help to establish the link between its structure and the particular cation dynamics that correspond to desirable electrical properties.

Principal Investigator: Dr Anthony Phillips
Local Contact: Dr Nicholas Funnell
Experimenter: Miss Jiaxun Liu
Experimenter: Mr Zhengqiang Yang

DOI: 10.5286/ISIS.E.RB1720209

ISIS Experiment Number: RB1720209

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 Anthony Phillips et al; (2017): Phase diagram of a switchable dielectric framework near the critical point, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1720209

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