Cation reorientation dynamics in a metal formate perovskite

DOI

Hybrid metal-organic perovskites are promising functional materials, but the complex interactions between organic cations and the framework surrounding them are difficult to model. We have recently proposed, on the basis of total neutron scattering data, that in the high-temperature phase of dimethylammonium manganese formate, the disordered (CH3)2NH2+ ion jumps between more orientations than are apparent from traditional crystallographic models. We propose here to test our new model by probing the quasi-elastic neutron scattering from the cation rotation. Analysis of the elastic incoherent structure factor as a function of temperature will enable us to confirm the number of rotational orientations available to the cation and measure the activation energy for hopping between them. The results will be relevant to the design of new framework materials with targeted dielectric properties.

Identifier
DOI https://doi.org/10.5286/ISIS.E.82354541
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/82354541
Provenance
Creator Miss Manting QIU; Miss Ling Wang; Miss Jiaxun Liu; Miss Lei Tan; Mr Mark Wilkinson; Dr Franz Demmel; Dr Anthony Phillips; Professor Martin Dove
Publisher ISIS Neutron and Muon Source
Publication Year 2019
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Natural Sciences; Physics
Temporal Coverage Begin 2016-10-17T23:00:00Z
Temporal Coverage End 2016-10-21T23:00:00Z