ISIS Neutron and Muon Source Data Journal

Direct measurement of the nuclear momentum distribution in a switchable dielectric framework

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], undergoes a phase transition associated with a dramatic decrease in dielectric constant on cooling, as the imidazolium ions stop rotating and freeze into position. The local dynamics in the high-temperature phases remain poorly understood; but it is precisely these that we will need to control in order to engineer new materials in this family with desirable properties. We therefore propose to measure the nuclear momentum distribution for each element in this sample via DINS measurements on VESUVIO. Our results will help to elucidate the link between the motion of the imidazolium cations and the material's dielectric switching.

Principal Investigator: Dr Anthony Phillips
Experimenter: Professor Giovanni Romanelli

DOI: 10.5286/ISIS.E.RB1810668

ISIS Experiment Number: RB1810668

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
Select the data format above to find out more about it.

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; (2018): Direct measurement of the nuclear momentum distribution in a switchable dielectric framework, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1810668

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