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Title

The Global and Local Symmetries of Nanostructured Ferroelectric Relaxor 0.94(Bi0.5Na0.5)TiO3 0.06BaTiO3

AuthorsMontero-Cabrera, María E.; Pardo, Lorena ; López García, Álvaro ; Fuentes-Montero, María E.; Ballinas-Casarrubias, M. Lourdes; Fuentes-Cobas, Luis E.
Issue Date9-Oct-2014
PublisherTaylor & Francis
CitationFerroelectrics 469(1): 50-60 (2014)
AbstractNovel submicrometer-grained 0.94(Bi0.5Na0.5)TiO3 ¿ 0.06 BaTiO3 ceramic, prepared from nanopowder by a combination of hot-pressing and recrystallization, is investigated by high-resolution synchrotron x-ray diffraction and x-ray absorption near-edge spectroscopy (XANES). The simplest and best-fitting Rietveld refinement of the performed wide-Q diffraction experiment corresponds to a three-phase system formed by a ferroelectric rhombohedral R3c phase, a globally cubic P-3mm phase and a small amount of nanosized (~12 nm) quasi-cubic phase. The globally cubic phase and the nanosized one built up a complex, nanostructured, configuration that accounts for the reported dielectric relaxor behavior. XANES reveals that the departures from centro-symmetry at the unit cell scale for the precursor powder and for the sintered ceramic are practically the same.
DescriptionPaper presented at the International Workshop on Relaxor Ferroelectrics (IWRF-2013) that took place in Ioffe Institute (St. Petersburg, Russia) during 1-6th July 2013.
Publisher version (URL)https://doi.org/10.1080/00150193.2014.948358
URIhttp://hdl.handle.net/10261/181955
Identifiersdoi: 10.1080/00150193.2014.948358
e-issn: 1563-5112
issn: 0015-0193
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