Abstract
Single crystals of BaLaGa 3O 7 doped with erbium were prepared by the Czochralski method and investigated by spectroscopy. The results of optical absorption measurements made at 5 K and at room temperature, were used to determine the energies and the probabilities for radiative transitions for several excited states of Er 3+. The data obtained by luminescence lifetime measurements in the 20–550 K temperature region and the results of a vibrational analysis of the host crystal were used to estimate the parameters relative to the electron-phonon interaction. The influence of the temperature on the selfquenching of luminescence originating from the 4S 3 2 and 4I 11 2 level was studied and interpreted in terms of ion-ion interaction.
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