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dc.contributor.authorBorkar, Hitesh
dc.contributor.authorRao, Vaibhav
dc.contributor.authorTomar, M.
dc.contributor.authorGupta, Vinay
dc.contributor.authorScott, James Floyd
dc.contributor.authorKumar, Ashok
dc.date.accessioned2017-02-28T11:30:12Z
dc.date.available2017-02-28T11:30:12Z
dc.date.issued2017-02-23
dc.identifier.citationBorkar , H , Rao , V , Tomar , M , Gupta , V , Scott , J F & Kumar , A 2017 , ' Experimental evidence of electronic polarization in a family of photo-ferroelectrics ' , RSC Advances , vol. 7 , pp. 12842-12855 . https://doi.org/10.1039/c7ra00500hen
dc.identifier.issn2046-2069
dc.identifier.otherPURE: 249251912
dc.identifier.otherPURE UUID: 9f9f6099-8422-480a-9252-7782749debec
dc.identifier.otherScopus: 85014256388
dc.identifier.otherWOS: 000395934500051
dc.identifier.urihttps://hdl.handle.net/10023/10378
dc.description.abstractWe report a family of ferroelectric materials which exhibit optical control of dielectric constant, polarization, and conductivity at ambient conditions. The evolution of photo-induced charge carriers under illumination of weak monochromatic light of wavelength λ = 405 nm developed electronic polarization that reorients or enhances the ionic polarization in the direction of the applied electric field, hence significantly increasing the net polarization. The presence of electronic polarization in perovskites, especially ABO3 oxides, and the contribution to the ionic polarization, is a matter of debate among ferroelectric community; however, recent experimental evidence proved that electronic polarization contributes to overall polarization in different ways: if it is additive, it will act along the direction of ionic polarization; and if it is subtractive, it will act in the opposite direction. We report a newly developed lead-based ferroelectric family Pb1-x(Li0.5Bi0.5)x(Zr0.2Ti0.8)O3 (PLBZT) for x = 0.3, 0.4, 0.5, which have been successfully synthesized by a conventional solid state reaction route. The X-ray diffraction patterns were recorded at room temperature and refined with Rietveld parameters which confirm its tetragonal structure with P4mm space group symmetry. The Raman spectra, dielectric properties and leakage currents are analyzed. The current conduction mechanisms obey bulk limited Poole–Frenkel model and provide optical dielectric constant similar to theoretical value to lead zirconate titanate.
dc.language.isoeng
dc.relation.ispartofRSC Advancesen
dc.rightsCopyright the Author(s) 2017. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.en
dc.subjectQC Physicsen
dc.subjectT Technologyen
dc.subjectNDASen
dc.subject.lccQCen
dc.subject.lccTen
dc.titleExperimental evidence of electronic polarization in a family of photo-ferroelectricsen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Chemistryen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.identifier.doihttps://doi.org/10.1039/c7ra00500h
dc.description.statusPeer revieweden


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