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dc.contributor.authorCordrey, Keith J.
dc.contributor.authorStanczyk, Magda
dc.contributor.authorDixon, Charlotte Amy Louise
dc.contributor.authorKnight, Kevin S.
dc.contributor.authorGardner, Jonathan
dc.contributor.authorMorrison, Finlay D.
dc.contributor.authorLightfoot, Philip
dc.identifier.citationCordrey , K J , Stanczyk , M , Dixon , C A L , Knight , K S , Gardner , J , Morrison , F D & Lightfoot , P 2015 , ' Structural and dielectric studies of the phase behaviour of the topological ferroelectric La 1-x Nd x TaO 4 ' , Dalton Transactions , vol. 44 , no. 23 , pp. 10673-10680 .
dc.identifier.otherPURE: 166942017
dc.identifier.otherPURE UUID: 89043945-0ccd-4fdf-87c0-55586a0ff413
dc.identifier.otherORCID: /0000-0002-2813-3142/work/48131878
dc.identifier.otherORCID: /0000-0001-7048-3982/work/59464437
dc.identifier.otherWOS: 000355701000016
dc.identifier.otherORCID: /0000-0002-8862-8315/work/61133154
dc.identifier.otherScopus: 84930637717
dc.descriptionWe thank the University of St Andrews and EPSRC (via DTG studentships to CALD and JG) for funding,en
dc.description.abstractThe layered perovskite LaTaO4 has been prepared in its polar orthorhombic polymorphic form at ambient temperature. Although no structural phase transition is observed in the temperature interval 25° C < T < 500 °C, a very large axial thermal contraction effect is seen, which can be ascribed to an anomalous buckling of the perovskite octahedral layer. The non-polar monoclinic polymorph can be stabilised at ambient temperature by Nd-doping. A composition La0.90Nd0.10TaO4 shows a first-order monoclinic-orthorhombic (non-polar to polar) transition in the region 250° C < T < 350 °C. Dielectric responses are observed at both the above structural events but, despite the ‘topological ferroelectric’ nature of orthorhombic LaTaO4, we have not succeeded in obtaining ferroelectric P–E hysteresis behaviour. Structural relationships in the wider family of AnBnX3n+2 layered perovskites are discussed.
dc.relation.ispartofDalton Transactionsen
dc.rightsCopyright 2015 the Authors. This is an Open Access Article licensed under a Creative Commons Attribution 3.0 Unported Licence (
dc.subjectQD Chemistryen
dc.titleStructural and dielectric studies of the phase behaviour of the topological ferroelectric La1-xNdxTaO4en
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Chemistryen
dc.contributor.institutionUniversity of St Andrews. EaSTCHEMen
dc.description.statusPeer revieweden

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