SciELO - Scientific Electronic Library Online

vol.54 suppl.2Luminescence detection of phase transitions in crystals and nanoparticle inclusionsUnique carbon-nano-structure for high quality electron-emitter to be employed in a variety of applications author indexsubject indexsearch form
Home Pagealphabetic serial listing  

Services on Demand




Related links

  • Have no similar articlesSimilars in SciELO


Revista mexicana de física

Print version ISSN 0035-001X


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.

Keywords : Energy transfer efficiency; luminescence; spectroscopy; SBN; Nd3+; Yb3+; phase transition.

        · abstract in Spanish     · text in English     · English ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License