Coupled short-range ferroelectric and magnetic order in PbFe1/2Nb1/2O3

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dc.contributor.authorStock, Cen_AU
dc.contributor.authorDunsiger, SRen_AU
dc.contributor.authorMole, RAen_AU
dc.contributor.authorLi, XBen_AU
dc.contributor.authorLuo, Hen_AU
dc.date.accessioned2014-05-19T06:59:21Zen_AU
dc.date.available2014-05-19T06:59:21Zen_AU
dc.date.issued2013-09-13en_AU
dc.date.statistics2014-05-19en_AU
dc.description.abstractA neutron scattering investigation of the magnetoelectric coupling in PbFe1/2Nb1/2O3 has been undertaken. Ferroelectric order occurs below 400 K, as evidenced by the softening with temperature and subsequent recovery of the zone center transverse optic phonon mode energy ((h) over bar Omega(0)). Over the same temperature range, magnetic correlations become resolution limited on a terahertz energy scale. In contrast to the behavior of nonmagnetic disordered ferroelectrics [namely Pb(Mg, Zn)(1/3)Nb2/3O3], we report the observation of a strong deviation from linearity in the temperature dependence of ((h) over bar Omega(0))(2). This deviation is compensated by a corresponding change in the energy scale of the magnetic excitations, as probed through the first moment of the inelastic response. The coupling between the short-range ferroelectric and antiferromagnetic correlations is consistent with calculations showing that the ferroelectricity is driven by the displacement of the body-centered iron site, illustrating the multiferroic nature of magnetic-lead-based relaxors in the dynamical regime. © 2013, American Physical Society.en_AU
dc.identifier.articlenumber094105en_AU
dc.identifier.citationStock, C., Dunsiger, S. R., Mole, R. A., Li, X., & Luo, H. (2013). Coupled short-range ferroelectric and magnetic order in PbFe1/2Nb1/2O3. Physical Review B, 88(9), 094105. doi:10.1103/PhysRevB.88.094105en_AU
dc.identifier.govdoc5432en_AU
dc.identifier.issn1098-0121en_AU
dc.identifier.issue9en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevB.88.094105en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5602en_AU
dc.identifier.volume88en_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectNeutronsen_AU
dc.subjectFerroelectric materialsen_AU
dc.subjectPhase transformationsen_AU
dc.subjectMagnetismen_AU
dc.subjectPerovskiteen_AU
dc.subjectTemperature dependenceen_AU
dc.titleCoupled short-range ferroelectric and magnetic order in PbFe1/2Nb1/2O3en_AU
dc.typeJournal Articleen_AU
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