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dc.contributor.authorVenet, Michel
dc.contributor.authorZabotto, Fabio L.
dc.contributor.authorGarcía García, José Eduardo
dc.contributor.authorOchoa Guerrero, Diego A.
dc.contributor.authorGarcía, Ducinei
dc.contributor.authorEiras, Jose A.
dc.contributor.authorM'Peko, Jean-Claude
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física Aplicada
dc.identifier.citationVenet, M. [et al.]. La3+-induced (micro)structural changes and origin of the relaxor-like phase transition in ferroelectric lead barium niobate electroceramics. "Journal of materials science", 01 Abril 2014, vol. 49, núm. 14, p. 4825-4832.
dc.description.abstractLead barium niobate (Pb1-x Ba (x) Nb2O6, PBN) ferroelectric materials have been and are the subject of numerous studies in literature due to their potential for wide-ranging applications in the electronic industry. In this work, La3+-doped Pb0.56Ba0.44Nb2O6 (PBN44) electroceramics were prepared and investigated in terms of X-ray diffraction, scanning electron microscopy, thermal spectra of dielectric permittivity, Curie-Weiss law, and hysteresis loop characteristics. It was noted that La3+ doping favors the formation of orthorhombic mm2 phase in PBN44, which originally shows only the tetragonal 4mm symmetry-related phase. In particular, the PBN44 material with 1 wt% La2O3 displays (micro)structural characteristics and dielectric properties similar to those from PBN compositions lying within their morphotropic phase boundary region. Our results also show that La3+ is able to promote a change of the ferroelectric to paraelectric phase transition appearance of PBN44 from pseudo-normal to really diffuse. However, conversion to a diffuse plus relaxor transition behavior reveals directly linked to incommensurate superstructures present and dielectrically-active in PBN materials toward low temperatures, with an intrinsically frequency-dispersive dielectric response. This statement is also supported by observation of hysteresis loops showing a transformation trend to pseudo-slim-like, even in the normal-like ferroelectrics, when moving into the temperature region of incommensuration manifestation.
dc.format.extent8 p.
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshElectronic ceramics
dc.subject.otherZirconate-Titanate Ceramics
dc.subject.otherMagnesium Niobate
dc.titleLa3+-induced (micro)structural changes and origin of the relaxor-like phase transition in ferroelectric lead barium niobate electroceramics
dc.subject.lemacCeràmica electrònica
dc.contributor.groupUniversitat Politècnica de Catalunya. CEMAD - Caracterització Elèctrica de Materials i Dispositius
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
local.citation.authorVenet, M.; Zabotto, F. L.; Garcia, J. E.; Ochoa, D. A.; García, D.; Eiras, J. A.; M'Peko, J.-C.
local.citation.publicationNameJournal of materials science

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