Neutron analysis of the structure of SrAl2O4 from 300 to 1273 K.

DOI

SrAl2O4 is a stuffed tridymite that has attracted a good deal of interest, since doping with Eu2+ leads to a material with elastic-luminescent response. The structure and phase transitions have received some attention - e.g. neutron diffraction at five distinct temperatures - and are reasonably well understood. These have been reviewed in the course of a recent dieletric and resonant ultrasound (RUS) study of SrAl2O4:Eu, and the need for more detailed experimental studies identified. The RUS shows a shear modulus inflection and strong dissipation and there is a weak dielectric anomaly, all at around 650 K, which does not coincide with any of the phase transitions previously reported. We plan to investigate these anomalies through a detailed study in fine temperature steps, obtaining precise strain and structural data, from room temperature through the phase transitons, to 1273 K.

Identifier
DOI https://doi.org/10.5286/ISIS.E.24079651
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24079651
Provenance
Creator Professor Michael Carpenter; Dr Kevin Knight
Publisher ISIS Neutron and Muon Source
Publication Year 2013
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 Photon- and Neutron Geosciences
Temporal Coverage Begin 2010-05-24T07:02:07Z
Temporal Coverage End 2010-06-27T20:58:25Z