Artículo

Structural, hyperfine and Raman properties of RE2FeSbO7compounds

Berndt, G.; Silva, K. L.; Ivashita, F. F.; Paesano, A.; Blanco, Marìa CeciliaIcon ; Pannunzio Miner, Elisa VictoriaIcon ; Carbonio, Raul ErnestoIcon ; Dantas, S. M.; Ayala, A. P.; Isnard, O.
Fecha de publicación: 01/2015
Editorial: Elsevier Science Sa
Revista: Journal of Alloys and Compounds
ISSN: 0925-8388
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:

Resumen

Pyrochlores of the RE2FeSbO7type were synthesized by ball-milling followed by annealing in free atmosphere at high temperatures. The samples prepared were characterized by X-ray diffraction, Raman spectroscopy and 57Fe Mössbauer spectroscopy, at room temperature. The results showed that RE2FeSbO7compounds have a cubic structure, i.e., Fd-3m (#227) space group, and that a site disorder takes place for the RE's of larger ionic radii. Lattice parameters, Raman bands and quadrupole splittings were shown to depend correlatedly on the RE ionic radius. This behavior is discussed in terms of the pyrochlore crystallographic structure.
Palabras clave: Pyrochlore , Raman Bands , Rietveld Analysis , Site Disorder
 
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/37586
URL: http://www.sciencedirect.com/science/article/pii/S0925838814019239
DOI: http://dx.doi.org/10.1016/j.jallcom.2014.08.068
Colecciones
Articulos(INFIQC)
Articulos de INST.DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Citación
Berndt, G.; Silva, K. L.; Ivashita, F. F.; Paesano, A.; Blanco, Marìa Cecilia; et al.; Structural, hyperfine and Raman properties of RE2FeSbO7compounds; Elsevier Science Sa; Journal of Alloys and Compounds; 618; 1-2015; 635-642
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