Ferroelastic phase in SrBi2Ta2O9 and study of the ferroelectric phase-transition dynamics

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dc.contributorVirginia Techen
dc.contributor.authorKamba, S.en
dc.contributor.authorPokorny, J.en
dc.contributor.authorPorokhonskyy, V.en
dc.contributor.authorPetzelt, J.en
dc.contributor.authorMoret, M. P.en
dc.contributor.authorGarg, A.en
dc.contributor.authorBarber, Z. H.en
dc.contributor.authorZallen, Richard H.en
dc.contributor.departmentPhysicsen
dc.date.accessed2014-01-24en
dc.date.accessioned2014-02-03T15:57:16Zen
dc.date.available2014-02-03T15:57:16Zen
dc.date.issued2002-08en
dc.description.abstractPolarized microscope observation of ferroelastic domains in a SrBi2Ta2O9 (SBT) single crystal reveals the presence of domains up to T(c1)similar or equal to770 K, which supports the ferroelasticity and Amam symmetry of the intermediate phase between ferroelectric and paraelectric phases. Far-infrared spectra of SBT ceramics, single crystal and thin films show a well underdamped optical soft mode at 28 cm(-1), which partially softens to 21 cm(-1) near the ferroelectric transition temperature (T(c2)congruent to600 K). This softening does not explain the entire anomaly of low-frequency permittivity observed near T-c2. On the basis of high-frequency measurements, which do not show a significant dispersion, central-mode-type dispersion in the 10-100 GHz range is proposed as an explanation. So, the phase transition at T-c2 apparently shows a crossover behavior between the displacive and the order-disorder type. (C) 2002 American Institute of Physics.en
dc.identifier.citationKamba, S; Pokorny, J; Porokhonskyy, V; et al., "Ferroelastic phase in SrBi2Ta2O9 and study of the ferroelectric phase-transition dynamics," Appl. Phys. Lett. 81, 1056 (2002); http://dx.doi.org/10.1063/1.1498005en
dc.identifier.doihttps://doi.org/10.1063/1.1498005en
dc.identifier.issn0003-6951en
dc.identifier.urihttp://hdl.handle.net/10919/25256en
dc.identifier.urlhttp://scitation.aip.org/content/aip/journal/apl/81/6/10.1063/1.1498005en
dc.language.isoen_USen
dc.publisherAIP Publishingen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectcrystal-structureen
dc.subjectsr0.85bi2.1ta2o9en
dc.subjecttantalateen
dc.subjectPhysicsen
dc.titleFerroelastic phase in SrBi2Ta2O9 and study of the ferroelectric phase-transition dynamicsen
dc.title.serialApplied Physics Lettersen
dc.typeArticle - Refereeden

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