Inelastic neutron scattering studies of ?-Bi2O3 -related oxide-ion conductors

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dc.contributor.authorLing, CDen_AU
dc.contributor.authorWind, Jen_AU
dc.contributor.authorMole, RAen_AU
dc.date.accessioned2021-08-24T21:42:15Zen_AU
dc.date.available2021-08-24T21:42:15Zen_AU
dc.date.issued2017-07-12en_AU
dc.date.statistics2021-08-17en_AU
dc.description.abstractInelastic neutron scattering is the only experimental technique that simultaneously probes ionic diffusion (as quasielastic neutron scattering, QENS) and lattice dynamics (as a generalised density of states, GDOS). In solid-state ionic conductors where the diffusing species has a predominantly incoherent neutron scattering cross section – i.e., H – key parameters describing diffusion can be extracted directly by modelling the form of the QENS. QENS analysis is a far more complex (and unresolved) problem when the diffusing atoms have significant coherent cross-sections, such as O and Li. However, it is possible to interpret QENS indirectly in such cases by using the experimental GDOS to validate ab initio dynamics simulations, then interrogating the simulations to identify diffusion mechanisms. This is obviously most effective when the experimental signal is strong, i.e., conductivity is high. In the case of oxide-ionic conductors, this points to stabilised versionsof ?-Bi2O3. Here, we present new results for a series of cubic ?-Bi2O3-related compounds with (3+3)-D incommensurately modulated structures. We identify a mechanism by which oxide ions migrate through continuous and nearly isotropic channels. The results are compared to conductivity data and theoretical models for pure ?-Bi2O3, and used to suggest chemical modifications that could maximise performance and cycling stability.en_AU
dc.identifier.citationLing, C., Wind, J., & Mole, R. (2017). Inelastic neutron scattering studies of ?-Bi2O3 -related oxide-ion conductors. Paper presented at ICNS 2017 (International Conference on Neutron Scattering), Daejeon, South Korea, 9 to 13 July 2017. Retrieved from: http://www.icns2017.org/program.phpen_AU
dc.identifier.conferenceenddate13 July 2017en_AU
dc.identifier.conferencenameICNS 2017 (International Conference on Neutron Scattering)en_AU
dc.identifier.conferenceplaceDaejeon, South Koreaen_AU
dc.identifier.conferencestartdate9 July 2017en_AU
dc.identifier.urihttp://www.icns2017.org/program.phpen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11464en_AU
dc.language.isoenen_AU
dc.publisherInternational Conference on Neutron Scatteringen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectInelastic scatteringen_AU
dc.subjectIonic conductivityen_AU
dc.subjectDiffusionen_AU
dc.subjectOxidesen_AU
dc.subjectSimulationen_AU
dc.titleInelastic neutron scattering studies of ?-Bi2O3 -related oxide-ion conductorsen_AU
dc.typeConference Abstracten_AU
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