Neutron and x-ray diffraction study of cubic [111] field-cooled Pb(Mg1/3Nb2/3)O-3

Simple item page
dc.contributorVirginia Techen
dc.contributor.authorStock, Chrisen
dc.contributor.authorXu, Guangyongen
dc.contributor.authorGehring, Peter M.en
dc.contributor.authorLuo, Hongjieen
dc.contributor.authorZhao, X.en
dc.contributor.authorCao, Huen
dc.contributor.authorLi, Jiefangen
dc.contributor.authorViehland, Dwight D.en
dc.contributor.authorShirane, Genen
dc.contributor.departmentMaterials Science and Engineering (MSE)en
dc.date.accessed2014-04-23en
dc.date.accessioned2014-05-07T15:37:02Zen
dc.date.available2014-05-07T15:37:02Zen
dc.date.issued2007-08-01en
dc.description.abstractNeutron and x-ray diffraction techniques have been used to study the competing long- and short-range polar order in the relaxor ferroelectric Pb(Mg1/3Nb2/3)O-3 (PMN) under a [111] applied electric field. Despite reports of a structural transition from a cubic phase to a rhombohedral phase for fields E>1.7 kV/cm, we find that the bulk unit cell remains cubic (within a sensitivity of 90 degrees-alpha=0.03 degrees) for fields up to 8 kV/cm. Furthermore, we observe a structural transition confined to the near surface volume or "skin" of the crystal where the cubic cell is transformed to a rhombohedral unit cell at T-c=210 K for E>4 kV/cm, for which 90 degrees-alpha=0.08 +/- 0.03 degrees below 50 K. While the bulk unit cell remains cubic, a suppression of the diffuse scattering and concomitant enhancement of the Bragg peak intensity is observed below T-c=210 K, indicating a more ordered structure with increasing electric field yet an absence of a long-range ferroelectric ground state in the bulk. The electric field strength has little effect on the diffuse scattering above T-c, however, below T-c the diffuse scattering is reduced in intensity and adopts an asymmetric line shape in reciprocal space. The absence of hysteresis in our neutron measurements (on the bulk) and the presence of two distinct temperature scales suggests that the ground state of PMN is not a frozen glassy phase as suggested by some theories but is better understood in terms of random fields introduced through the presence of structural disorder. Based on these results, we also suggest that PMN represents an extreme example of the two-length scale problem, and that the presence of a distinct skin may be necessary for a relaxor ground state.en
dc.description.sponsorshipNatural Science and Engineering Research Council of Canadaen
dc.description.sponsorshipDMR-9986442en
dc.description.sponsorshipU.S. DOE under Contract No. DE-AC02-98CH10886en
dc.description.sponsorshipOffice of Naval Research under Grant No. N00014-99-1-0738en
dc.format.mimetypeapplication/pdfen
dc.identifier.citationStock, C.; Xu, G. Y.; Gehring, P. M.; Luo, H.; Zhao, X.; Cao, H.; Li, J. F.; Viehland, D.; Shirane, G., "Neutron and x-ray diffraction study of cubic [111] field-cooled Pb(Mg1/3Nb2/3)O-3," Phys. Rev. B 76, 064122 DOI: http://dx.doi.org/10.1103/PhysRevB.76.064122en
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.76.064122en
dc.identifier.issn1098-0121en
dc.identifier.urihttp://hdl.handle.net/10919/47866en
dc.identifier.urlhttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.76.064122en
dc.language.isoen_USen
dc.publisherAmerican Physical Societyen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectFerroelectricityen
dc.subjectQuasi-elastic scatteringen
dc.subjectPhase transitionsen
dc.subjectSingle crystalsen
dc.subjectLead magnoniobateen
dc.subjectElectric fieldsen
dc.subjectBehavioren
dc.subjectPhysicsen
dc.subjectCondensed matteren
dc.titleNeutron and x-ray diffraction study of cubic [111] field-cooled Pb(Mg1/3Nb2/3)O-3en
dc.title.serialPhysical Review Ben
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
PhysRevB.76.064122.pdf
Size:
383.5 KB
Format:
Adobe Portable Document Format
Description:
Main article
Download

Collections

Scholarly Works, Materials Science and Engineering (MSE)