Vibronic transitions of trivalent Er and Ce in BaY2F8 single crystals
Anno: 2003
Autori: Baraldi A., Capelletti R., Mazzera M., Ponzoni A., Sani E., Tonelli M.
Affiliazione autori: INFM and Department of Physics, University of Parma, 43100 Parma, Italy;
INFM and Department of Physics, University of Pisa, 56127 Pisa, Italy
Abstract: High resolution (0.02 cm(-1)) Fourier transform spectroscopy was applied in the 9-300 K and 100-24,000 cm(-1) ranges, respectively, to detect in Er3+ and Ce3+ doped Bay(2)F(8) single crystals (1) the narrow line spectra due to the intraconfigurational 4f–>4f transitions of the rare earths (RE) and (2) the possible vibronic tails accompanying the zero-phonon lines. The F-2(5/2) –> F-2(7/2) transition was monitored for the Ce3+-doping and the crystal field splitting of the initial and final manifold was determined. Weak vibronic spectra accompanying six among the nine investigated 4f–>4f transitions of Er3+ and the F-2(5/2) –> F-2(7/2) transition of Ce3+ were detected. The vibronic spectra amplitude was found to scale with the RE contents. On the basis of the IR- and Raman-active vibrational modes, either measured or quoted in the literature, most of the vibronic lines could be successfully assigned to the lattice modes. Violations of the selection rules were envisaged and discussed.
Giornale/Rivista: RADIATION EFFECTS AND DEFECTS IN SOLIDS
Volume: 158 (1-6) Da Pagina: 241 A: 245
Parole chiavi: infrared spectroscopy; vibronic transitions; Erbium; Cerium; fluoridesDOI: 10.1080/1042015022000037418Citazioni: 2dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-28Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui