IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Hyperfine characterization of Bi(1.9)Te(0.1)SrNb(1.9)Hf(0,1)O9
Autor/es:
R.E. ALONSO; A. LOPEZ-GARCIA; J.A. MART¨ªNEZ; A. CASTRO; A.R. PASCHOAL; E.N. SILVA; A.P. AYALA; I. GUEDES
Revista:
SOLID STATE COMMUNICATIONS
Editorial:
Elsevier Ltd.
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 873K. Two sites are occupied by probes and the temperature dependence of both indicates a continuos phase transition at about 625K. One site is ordered while the other 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¡Üx¡Ü0.5) shows a strong dependence on composition.