Influence of cation ordering on octahedral tilting in perovskites

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dc.contributor.authorZhang, Zen_AU
dc.contributor.authorHoward, CJen_AU
dc.contributor.authorCarpenter, MAen_AU
dc.contributor.authorKnight, KSen_AU
dc.date.accessioned2022-08-25T01:14:35Zen_AU
dc.date.available2022-08-25T01:14:35Zen_AU
dc.date.issued2005-11-27en_AU
dc.date.statistics2022-05-20en_AU
dc.descriptionPhysical copy held by ANSTO Library at DDC 539.7217/2en_AU
dc.description.abstractThe compound LaO.6SrO.1Ti03, taken to represent the ideal Lag/3TiO3, adopts a structure in which the A-site layers are alternately fully and partly occupied by the La(Sr)ions. At room temperature the structure also shows a tilting of the TiO5 octahedra around a single axis perpendicular to the layering direction. Quenching the material during preparation can produce a variant in which the cations are disordered on the A-site, offering the opportunity to study the effect of cation ordering on octahedral tilting. Slow-cooled and quenched specimens were studied over a range of temperatures using high-resolution neutron powder diffraction. Inspection of the relevant diffraction peaks confirmed the expected difference in cation ordering. At room temperature, the cell volume was 0.1% less in the ordered sample than in the disordered one. The extent of octahedral tilting was much the same in the two samples, with similar transition temperatures for removal of the tilting. The orthorhombic distortion that accompanied this tilting in the ordered sample was, surprisingly, not evident in the disordered sample——that is the effect of disordering the cations seems to switch off the strain (tilt) order parameter coupling in this perovskite. © 2005 The Authorsen_AU
dc.identifier.booktitleFinal Programme and Abstract Booken_AU
dc.identifier.citationZhang, Z., Howard, C. J., Carpenter, M. A., & Knight, K. S. (2005). Influence of cation ordering on octahedral tilting in perovskites. Paper presented at the Eighth International Conference on Neutron Scattering ICNS 2005: "Neutrons for structure and dynamics - a new era", Sydney Convention & Exhibition Centre, Sydney, Australia, 27 November-2 December 2005. In Final Programme and Abstract Book, (p. 233).en_AU
dc.identifier.conferenceenddate2 December 2005en_AU
dc.identifier.conferencenameEighth International Conference on Neutron Scattering ICNS 2005: 'Neutrons for structure and dynamics - a new eraen_AU
dc.identifier.conferenceplaceSydney, Australiaen_AU
dc.identifier.conferencestartdate27 November 2005en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13602en_AU
dc.language.isoenen_AU
dc.publisherThe Bragg Institute, Australian Nuclear Science and Technology Organisationen_AU
dc.subjectLanthanumen_AU
dc.subjectStrontiumen_AU
dc.subjectTitaniumen_AU
dc.subjectLayersen_AU
dc.subjectAmbient temperatureen_AU
dc.subjectCationsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectPerovskiteen_AU
dc.subjectStrainsen_AU
dc.titleInfluence of cation ordering on octahedral tilting in perovskitesen_AU
dc.typeConference Abstracten_AU
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