Damped soft phonons and diffuse scattering in 40%Pb(Mg1/3Nb2/3)O-3-60%PbTiO3

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dc.contributorVirginia Techen
dc.contributor.authorStock, Chrisen
dc.contributor.authorEllis, D.en
dc.contributor.authorSwainson, I. P.en
dc.contributor.authorXu, Guangyongen
dc.contributor.authorHiraka, Haruhiroen
dc.contributor.authorZhong, Z.en
dc.contributor.authorLuo, Hongjieen
dc.contributor.authorZhao, X.en
dc.contributor.authorViehland, Dwight D.en
dc.contributor.authorBirgeneau, R. J.en
dc.contributor.authorShirane, Genen
dc.contributor.departmentMaterials Science and Engineering (MSE)en
dc.date.accessed2013-12-18en
dc.date.accessioned2014-02-11T13:45:54Zen
dc.date.available2014-02-11T13:45:54Zen
dc.date.issued2006-02-13en
dc.description.abstractUsing neutron elastic and inelastic scattering and high-energy x-ray diffraction, we present a comparison of 40% Pb(Mg1/3Nb2/3)O-3-60% PbTiO3 (PMN-60PT) with pure Pb(Mg1/3Nb2/3)O-3 (PMN) and PbTiO3 (PT). We measure the structural properties of PMN-60PT to be identical to pure PT, however, the lattice dynamics are exactly that previously found in relaxors PMN and Pb(Zn1/3Nb2/3)O-3 (PZN). PMN-60PT displays a well-defined macroscopic structural transition from a cubic to tetragonal unit cell at 550 K. The diffuse scattering is shown to be weak indicating that the structural distortion is long-range in PMN-60PT and short-range polar correlations (polar nanoregions) are not present. Even though polar nanoregions are absent, the soft optic mode is short-lived for wave vectors near the zone center. Therefore PMN-60PT displays the same waterfall effect as prototypical relaxors PMN and PZN. We conclude that it is random fields resulting from the intrinsic chemical disorder which is the reason for the broad transverse optic mode observed in PMN and PMN-60PT near the zone center and not due to the formation of short-ranged polar correlations. Through our comparison of PMN, PMN-60PT, and pure PT, we interpret the dynamic and static properties of the PMN-xPT system in terms of a random field model in which the cubic anisotropy term dominates with increasing doping of PbTiO3.en
dc.format.mimetypeapplication/pdfen
dc.identifier.citationStock, C ; Ellis, D ; Swainson, IP ; et al., Feb 2006. "Damped soft phonons and diffuse scattering in 40%Pb(Mg1/3Nb2/3)O-3-60%PbTiO3," PHYSICAL REVIEW B 73(6): 064107. DOI: 10.1103/PhysRevB.73.064107en
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.73.064107en
dc.identifier.issn1098-0121en
dc.identifier.urihttp://hdl.handle.net/10919/25361en
dc.identifier.urlhttp://link.aps.org/doi/10.1103/PhysRevB.73.064107en
dc.language.isoen_USen
dc.publisherAmerican Physical Societyen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectFerroelectricityen
dc.subjectPhase transitionsen
dc.subjectSingle crystalsen
dc.subjectTemperatureen
dc.subjectBehavioren
dc.subjectTitanateen
dc.subjectNeutronsen
dc.subjectModelen
dc.subjectPhysicsen
dc.titleDamped soft phonons and diffuse scattering in 40%Pb(Mg1/3Nb2/3)O-3-60%PbTiO3en
dc.title.serialPhysical Review Ben
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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