Single-crystal neutron diffraction study of superstructure ordering and domain behaviour in brownmillerite-type Ca2Fe2O5

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dc.contributor.authorAuckett, JEen_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorLing, CDen_AU
dc.date.accessioned2016-01-13T03:30:14Zen_AU
dc.date.available2016-01-13T03:30:14Zen_AU
dc.date.issued2014-09-15en_AU
dc.date.statistics2016-01-13en_AU
dc.description.abstractWe show that large single crystals of brownmillerite-type Ca2Fe2O5 can be grown using the floating-zone method under ambient pressure conditions, provided that the feed rods are pre-annealed to a very high density. Neutron diffraction data collected from these crystals show the emergence of a long-range ordered incommensurate phase at high temperature. The observation of this phase for the first time using neutrons proves that the incommensurate ordering of tetrahedral chains upon heating Ca2Fe2O5 is a truly long-range and bulk phenomenon. The results are used to compare and contrast the structures of Ca2Fe2O5 and Sr2Fe2O5, and are consistent with experimental observations of significantly higher oxide ionic conduction in the latter material.en_AU
dc.identifier.citationAuckett, J. E., Studer, A. J., & Ling, C. D. (2014). Single-crystal neutron diffraction study of superstructure ordering and domain behaviour in brownmillerite-type Ca2Fe2O5. Australian Journal of Chemistry, 67(12), 1824-1828. doi:10.1071/CH14358en_AU
dc.identifier.govdoc6379en_AU
dc.identifier.issn0004-9425en_AU
dc.identifier.issue12en_AU
dc.identifier.journaltitleAustralian Journal of Chemistryen_AU
dc.identifier.pagination1824-1828en_AU
dc.identifier.urihttp://dx.doi.org/10.1071/CH14358en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6517en_AU
dc.identifier.volume67en_AU
dc.language.isoenen_AU
dc.publisherCSIRO Publishingen_AU
dc.subjectMonocrystalsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectNeutronsen_AU
dc.subjectExperiment planningen_AU
dc.subjectZone meltingen_AU
dc.subjectThermal conductionen_AU
dc.titleSingle-crystal neutron diffraction study of superstructure ordering and domain behaviour in brownmillerite-type Ca2Fe2O5en_AU
dc.typeJournal Articleen_AU
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