Show simple item record

Files in this item


Item metadata

dc.contributor.authorRowley, S. E.
dc.contributor.authorChai, Yi-Sheng
dc.contributor.authorShen, Shi-Peng
dc.contributor.authorSun, Young
dc.contributor.authorJones, A. T.
dc.contributor.authorWatts, B. E.
dc.contributor.authorScott, James Floyd
dc.identifier.citationRowley , S E , Chai , Y-S , Shen , S-P , Sun , Y , Jones , A T , Watts , B E & Scott , J F 2016 , ' Uniaxial ferroelectric quantum criticality in multiferroic hexaferrites BaFe 12 O 19 and SrFe 12 O 19 ' , Scientific Reports , vol. 6 , 25724 .
dc.identifier.otherPURE: 242339558
dc.identifier.otherPURE UUID: e2a3e6f0-0b1f-46dc-a6e2-2a8a813fb486
dc.identifier.otherScopus: 84969222347
dc.identifier.otherWOS: 000375949000001
dc.description.abstractBaFe12O19 is a popular M-type hexaferrite with a Néel temperature of 720 K and is of enormous commercial value ($3 billion/year). It is an incipient ferroelectric with an expected ferroelectric phase transition extrapolated to lie at 6 K but suppressed due to quantum fluctuations. The theory of quantum criticality for such uniaxial ferroelectrics predicts that the temperature dependence of the electric susceptibility χ diverges as 1/T3, in contrast to the 1/T2 dependence found in pseudo-cubic materials such as SrTiO3 or KTaO3. In this paper we present evidence of the susceptibility varying as 1/T3, i.e. with a critical exponent γ = 3. In general γ = (d + z – 2)/z, where the dynamical exponent for a ferroelectric z = 1 and the dimension is increased by 1 from deff = 3 + z to deff = 4 + z due to the effect of long-range dipole interactions in uniaxial as opposed to multiaxial ferroelectrics. The electric susceptibility of the incipient ferroelectric SrFe12O19, which is slightly further from the quantum phase transition is also found to vary as 1/T3.
dc.relation.ispartofScientific Reportsen
dc.rightsCopyright © 2016, Rights Managed by Nature Publishing Group This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit
dc.subjectFerroelectrics and multiferroicsen
dc.subjectInformation storageen
dc.subjectPhase transitions and critical phenomenaen
dc.subjectQC Physicsen
dc.subjectQD Chemistryen
dc.titleUniaxial ferroelectric quantum criticality in multiferroic hexaferrites BaFe12O19 and SrFe12O19en
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.description.statusPeer revieweden

This item appears in the following Collection(s)

Show simple item record