IFLP 13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
PAC characterization of Bi1.9Te0.1SrNb1.9Hf0.1O9.
Autor/es:
R. E. ALONSO, A. R. LÓPEZ GARCÍA, J. A. MARTÍNEZ, A. CASTRO, A. R. PASCHOAL, E. N. SILVA, A. P. AYALA AND I. GUEDES.
Revista:
SOLID STATE COMMUNICATIONS
Referencias:
Año: 2006 vol. 139 p. 97 - 101
ISSN:
0038-1098
Resumen:
The Aurivillius type oxide Bi1.9Te0.1SrNb1.9Hf0.1O9 has been studied by Perturbed Angular Correlations spectroscopy using 181Ta probes. The spin precession curves were measured from room temperature up to 873 K. Two sites are occupied by probes and the temperature dependence of both indicates a continuous phase transition at about 625 K. One site is ordered while the other is disordered. This situation is analyzed in terms of simple models already applied to perovskites. The transition temperature of the solid solution Bi2−xTexSrNb2−xHfxO9 (with 0<x<0.5) shows a strong dependence on composition.
