Temperature and composition dependent structural investigation of the defect perovskite series Sr 1-x Ti 1-2x Nb 2x O 3 , 0?x?0.2
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Brant, William R; Schmid, Siegbert; Gu, Qinfen; Withers, Raymond; Hester, James; Avdeev, Maxim
Description
The crystal structure of the defect perovskite series Sr 1-xTi1-2xNb2xO3 has been investigated over a range of temperatures using high-resolution synchrotron X-ray diffraction, neutron diffraction and electron diffraction. Three distinct regions were observed: 0<x≤0.125 was a solid solution of Sr 1-xTi1-2xNb2xO3 with minor SrTiO3 intergrowth, 0.125<x≤0.2 was a pure Sr 1-xTi1-2xNb2xO3 solid solution adopting the cubic perovskite type structure (Pm3̄m) and for x>0.2 Sr0.8Ti0.6Nb0.4O3 and Sr...[Show more]
dc.contributor.author | Brant, William R | |
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dc.contributor.author | Schmid, Siegbert | |
dc.contributor.author | Gu, Qinfen | |
dc.contributor.author | Withers, Raymond | |
dc.contributor.author | Hester, James | |
dc.contributor.author | Avdeev, Maxim | |
dc.date.accessioned | 2015-12-10T22:57:04Z | |
dc.identifier.issn | 0022-4596 | |
dc.identifier.uri | http://hdl.handle.net/1885/60499 | |
dc.description.abstract | The crystal structure of the defect perovskite series Sr 1-xTi1-2xNb2xO3 has been investigated over a range of temperatures using high-resolution synchrotron X-ray diffraction, neutron diffraction and electron diffraction. Three distinct regions were observed: 0<x≤0.125 was a solid solution of Sr 1-xTi1-2xNb2xO3 with minor SrTiO3 intergrowth, 0.125<x≤0.2 was a pure Sr 1-xTi1-2xNb2xO3 solid solution adopting the cubic perovskite type structure (Pm3̄m) and for x>0.2 Sr0.8Ti0.6Nb0.4O3 and Sr 3TiNb4O15 formed a two phase region. The cubic structure for Sr0.8Ti0.6Nb0.4O3 was stable over the temperature range 901248 K and the thermal expansion co-efficient was determined to be 8.72(9)×10-6 K-1. Electron diffraction studies revealed diffuse scattering due to local scale Ti/Nb displacements and slightly enhanced octahedral rotations that did not lead to long range order. The octahedral rotations were observed to 'lock-in' at temperatures below ∼75 K resulting in a tetragonal structure (I4/mcm) with anti-phase octahedral tilting about the c-axis. | |
dc.publisher | Academic Press | |
dc.source | Journal of Solid State Chemistry | |
dc.subject | Keywords: Cubic perovskite; Cubic structure; Defect perovskite; Diffuse scattering; Electron diffraction study; High resolution; Intergrowth; Local scale; Lock-in; Long range orders; Octahedral rotations; Octahedral tilting; SrTiO; Structural investigation; Synchro Defect perovskite; Phase transition; Solid solution; Thermal expansion | |
dc.title | Temperature and composition dependent structural investigation of the defect perovskite series Sr 1-x Ti 1-2x Nb 2x O 3 , 0?x?0.2 | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 83 | |
dc.date.issued | 2010 | |
local.identifier.absfor | 030206 - Solid State Chemistry | |
local.identifier.ariespublication | u4217927xPUB543 | |
local.type.status | Published Version | |
local.contributor.affiliation | Brant, William R, University of Sydney | |
local.contributor.affiliation | Schmid, Siegbert Alexander, University of Sydney | |
local.contributor.affiliation | Gu, Qinfen, Australian Synchrotron | |
local.contributor.affiliation | Withers, Raymond, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Hester, James, Australian Nuclear Science and Technology Organisation | |
local.contributor.affiliation | Avdeev, Maxim, Australian Nuclear Science and Technology Organisation | |
local.description.embargo | 2037-12-31 | |
local.bibliographicCitation.issue | 9 | |
local.bibliographicCitation.startpage | 1998 | |
local.bibliographicCitation.lastpage | 2003 | |
local.identifier.doi | 10.1016/j.jssc.2010.06.002 | |
local.identifier.absseo | 970103 - Expanding Knowledge in the Chemical Sciences | |
dc.date.updated | 2016-02-24T10:44:09Z | |
local.identifier.scopusID | 2-s2.0-84755161099 | |
local.identifier.thomsonID | 000282139600014 | |
Collections | ANU Research Publications |
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