Ground state of the relaxor ferroelectricPb(Zn1/3Nb

Abstract

Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Ground state of the relaxor ferroelectric Pb(Zn1/3Nb2/3)O3 Xu, Guangyong; zhang, Z.; Bing, Y.; Ye, Z.-G.; Stock, C.; Shirane, G.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=fr L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D'UTILISER CE SITE WEB. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1103/PhysRevB.67.104102Physical Review B, 67,10 High energy x-ray diffraction measurements on Pb(Zn 1/3 Nb 2/3 )O 3 ͑PZN͒ single crystals show that the system does not have a rhombohedral symmetry at room temperature as previously believed. The phase ͑X͒ in the bulk of the crystal gives Bragg peaks similar to that of a nearly cubic lattice with a slight tetragonal distortion. The Bragg profile remains sharp with no evidence of size broadening due to the polar microcrystals. However, in our preliminary studies of the skin, we have found the expected rhombohedral ͑R͒ phase as a surface state. On the other hand, studies on an electric-field poled PZN single crystal clearly indicate a rhombohedral phase at room temperature.

Ground state monoclinic (Mb) phase in (110)c BiFeO3 epitaxial thin films

“…Similar effects have been observed in lead-based relaxors as well, where the near-surface region or "skin" layers have different structures than that of the bulk. [23][24][25][26] Our finding of the M b phase confirms that, in the ͑110͒ epitaxial film, the resulting polarization indeed lies in the ͑HHL͒ plane, in between the ͓110͔ and ͓111͔ directions. It is also relevant to note the presence of a slight offset of one of the domains with respect to the other along the ͑00L͒ in the mesh scans.…”

Dynamic origin of the morphotropic phase boundary: Soft modes and phase instability in0.68Pb(Mg1/3Nb2/3Cao1, Stock2, Xu3 et al. 2008Phys. Rev. BSelf Cite262150View full textAdd to dashboardCite

“…Second, the temperature at which the soft mode begins to recover is almost identical for PMN and PMN-0.32PT, even though PMN-0.32PT exhibits two well-defined structural phase transitions and no structural transition has been unambiguously identified in the bulk of PMN ͑in either zero or nonzero applied electric field͒ using neutron or x-ray diffraction techniques. [36][37][38][39][40] Third, the soft-mode recovery and the C → T phase transition occur at about the same temperature in both PMN-0.32PT and PMN-0.60PT, with the transition temperature T C being higher in PMN-0.60PT. Together these results suggest that the MPB defines a PT concentration where the structural transition temperature T C matches the temperature at which the soft mode recovers.…”

X-ray and neutron diffraction investigations of the structural phase transformation sequence under electric field in 0.7Pb(Mg1∕3Nb2∕3)-0.3PbTiO3 crystal

“…20 For PZN-x% PT, previous investigations have surprisingly revealed different structures for the "outside layer" and "inside bulk" regions. 5,21,22 This structural variability was attributed to differences in the volume of the specimen probed. Neutrons have a large spot size and penetrate the entire specimen, thus their signal is representative of the volume; whereas x-rays have a small spot size and a shallower penetration depth, thus their signal is representative of the region close to the crystal surface.…”