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Título: | The Global and Local Symmetries of Nanostructured Ferroelectric Relaxor 0.94(Bi0.5Na0.5)TiO3 0.06BaTiO3 |
Autor: | Montero-Cabrera, Maria Elena; Pardo, Lorena CSIC ORCID; García, Álvaro CSIC; Fuentes-Montero, María Elena; Ballinas-Casarrubias, M. Lourdes; Fuentes-Cobas, Luis E. | Fecha de publicación: | 9-oct-2014 | Editor: | Taylor & Francis | Citación: | Ferroelectrics 469(1): 50-60 (2014) | Resumen: | Novel 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. | Descripción: | Paper presented at the International Workshop on Relaxor Ferroelectrics (IWRF-2013) that took place in Ioffe Institute (St. Petersburg, Russia) during 1-6th July 2013. | Versión del editor: | https://doi.org/10.1080/00150193.2014.948358 | URI: | http://hdl.handle.net/10261/181955 | DOI: | 10.1080/00150193.2014.948358 | Identificadores: | doi: 10.1080/00150193.2014.948358 e-issn: 1563-5112 issn: 0015-0193 |
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