Structure and magnetism in rare earth strontium-doped cobaltates

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dc.contributor.authorJames, Men_AU
dc.contributor.authorMorales, Len_AU
dc.contributor.authorWallwork, KSen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorWithers, RLen_AU
dc.contributor.authorGoossens, DJen_AU
dc.date.accessioned2021-02-10T22:55:25Zen_AU
dc.date.available2021-02-10T22:55:25Zen_AU
dc.date.issued2006-11-15en_AU
dc.date.statistics2021-01-19en_AU
dc.descriptionPhysical copy held by ANSTO Library at DDC 539.7213/3. Part Ien_AU
dc.description.abstractSubstantial interest has recently been generated by rare earth cobaltate compounds as cathode materials for solid oxide fuel cells. We have synthesised a wide range of single–phase perovskite-based rare earth cobaltates (Ln1−xSrxCoO3−δ) (Ln=La3+–Yb3+). A combination of electron and X-ray diffraction of these phases reveals a complex family of tetragonal and orthorhombic superstructures. The nature of structural and magnetic ordering relies on both cation and oxygen vacancy distribution. Phase boundaries exists between compounds containing large, medium and small rare earths (between Nd3+ and Sm3+, and also between Gd3+ and Dy3+) and also at different Sr-doping levels. Powder neutron diffraction has been used in conjunction with the other techniques to reveal cation and oxygen vacancy ordering within these materials. These phases show mixed valence (3+/4+) cobalt oxidation states that increases with Sr content. A range of magnetic behaviours has been observed, including ordered antiferromagnetism at elevated temperatures (>300 K) in Ho0.2Sr0.8CoO2.75. © 2006 Elsevier B.V.en_AU
dc.identifier.citationJames, M., Morales, L., Wallwork, K., Avdeev, M., Withers, R., & Goossens, D. (2006). Structure and magnetism in rare earth strontium-doped cobaltates. Paper presented at the Eighth International Conference on Neutron Scattering (ICNS 2005), "Neutrons for structure and dynamics - a new era", Sydney, Australia, 27 November to 2 December 2005. In Campbell, S. J., Cadogan, J. M., Furusaka, M., Hauser, N., & James, M. (Eds), Physica B: Condensed Matter, 385–386(Part 1), 199-201. doi:10.1016/j.physb.2006.05.244en_AU
dc.identifier.conferenceenddate2 December 2005en_AU
dc.identifier.conferencenameEighth International Conference on Neutron Scattering (ICNS 2005), "Neutrons for structure and dynamics - a new era"en_AU
dc.identifier.conferenceplaceSydney, Australiaen_AU
dc.identifier.conferencestartdate27 November 2005en_AU
dc.identifier.editorsCampbell, S. J., Cadogan, J. M., Furusaka, M., Hauser, N., & James, M.en_AU
dc.identifier.issn0921-4526en_AU
dc.identifier.issuePart 1en_AU
dc.identifier.journaltitlePhysica B: Condensed Matteren_AU
dc.identifier.pagination199-201en_AU
dc.identifier.urihttps://doi.org/10.1016/j.physb.2006.05.244en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10358en_AU
dc.identifier.volume385-386en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectNeutron diffractionen_AU
dc.subjectPhase diagramsen_AU
dc.subjectCubic latticesen_AU
dc.subjectStrontiumen_AU
dc.subjectDoped materialsen_AU
dc.subjectVacanciesen_AU
dc.subjectOxygenen_AU
dc.subjectMagnetismen_AU
dc.subjectRare earth compoundsen_AU
dc.subjectSolid oxide fuel cellsen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectValenceen_AU
dc.subjectAntiferromagnetismen_AU
dc.titleStructure and magnetism in rare earth strontium-doped cobaltatesen_AU
dc.typeConference Paperen_AU
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