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Raman spectra, photoluminescence and dielectric relaxation in Bi 1.5 ZnNb 1.5 O 7 pyrochlore

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dc.contributor.authorLiu, Yunen_AU
dc.contributor.authorWithers, Raymonden_AU
dc.contributor.authorChen, Huaen_AU
dc.contributor.authorLi, Qingen_AU
dc.contributor.authorTan, Hark Hoeen_AU
dc.date.accessioned2015-12-10T23:35:06Z
dc.date.issued2011
dc.date.updated2016-02-24T08:22:09Z
dc.description.abstractIn this paper we investigate the origin of the dielectric relaxation characteristic of the nominally Bi1.5ZnNb1.5O7 (BZN) pyrochlore by a combined investigation of its electron diffraction and temperature-dependent micro-Raman spectra as well as its associated photoluminescence. It is found that the structural disorder and associated structural relaxation in BZN originates from short range chemical ordering of Bi/Zn in the A site of A2B2O7 pyrochlores, which can make a contribution to the overall dielectric permittivity but does not necessitate its dielectric polarisation relaxation. The origin of dielectric polarisation relaxation in BZN is probably attributed to the oxygen vacancies as well as associated defect clusters.
dc.identifier.issn1567-1739
dc.identifier.urihttp://hdl.handle.net/1885/69710
dc.publisherElsevier
dc.sourceCurrent Applied Physics
dc.subjectKeywords: Chemical ordering; Defect cluster; Dielectric permittivities; Micro-Raman spectra; Pyrochlores; Relaxors; Structural disorder; Structural disorders; Temperature dependent; Bismuth; Electron diffraction; Oxygen vacancies; Photoluminescence; Polarization; R Electron diffraction; Pyrochlore; Relaxor dielectric; Structural disorder
dc.titleRaman spectra, photoluminescence and dielectric relaxation in Bi 1.5 ZnNb 1.5 O 7 pyrochlore
dc.typeJournal article
local.bibliographicCitation.issue3 SUPPL.
local.bibliographicCitation.lastpageS174
local.bibliographicCitation.startpageS171
local.contributor.affiliationLiu, Yun, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationWithers, Raymond, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationChen, Hua, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationLi, Qing, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationTan, Hoe Hark, College of Physical and Mathematical Sciences, ANU
local.contributor.authoruidLiu, Yun, u4036265
local.contributor.authoruidWithers, Raymond, u8600734
local.contributor.authoruidChen, Hua, u4158806
local.contributor.authoruidLi, Qing, u4367518
local.contributor.authoruidTan, Hoe Hark, u9302338
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor030206 - Solid State Chemistry
local.identifier.absseo970103 - Expanding Knowledge in the Chemical Sciences
local.identifier.ariespublicationf2965xPUB2100
local.identifier.citationvolume11
local.identifier.doi10.1016/j.cap.2011.03.014
local.identifier.scopusID2-s2.0-80255122750
local.identifier.thomsonID000296605000033
local.type.statusPublished Version

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