Servicios Personalizados
Revista
Articulo
Indicadores
- Citado por SciELO
- Accesos
Links relacionados
- Similares en SciELO
Compartir
Revista mexicana de física
versión impresa ISSN 0035-001X
Resumen
CALDINO, U et al. Energy transfer in Sr0.6Ba0.4Nb2O6 through its ferroelectric phase transition. Rev. mex. fis. [online]. 2008, vol.54, suppl.2, pp.39-43. ISSN 0035-001X.
Resonant Nd3+ Yb3+ energy-transfer in the Nd3+ and Yb3+ co-doped Sr0.6Ba0.4(NbO3)2 (SBN) crystal is investigated by using pulsed and steady state laser spectroscopy. Spectroscopic data revealed that the energy transfer occurs via a non-radiative process. The efficiency of this energy transfer was estimated from spectral data in around 35%. Back energy transfer is not observed at the 295-415 K temperature range. A marked reduction in the luminescence intensity of Yb3+ ions directly excited into their 2F7/2 2F5/2 transition, taking place at around 345 K, is due to the ferro to paraelectric phase transition in SBN. This thermal behavior, which is not clearly manifested when Yb3+ ions are excited via Nd3+ ions, has been explained in terms of structural changes taking place around the Yb3+ ions when the crystal becomes non-polar.
Palabras llave : Energy transfer efficiency; luminescence; spectroscopy; SBN; Nd3+; Yb3+; phase transition.