Abstract
Tb3+-doped fluorophosphate glass with a composition of P2O5+K2O+KF+BaO+Al2O3+Tb4O7 was prepared by melt quenching technique and characterized through emission spectra and decay curves as a function of pressure up to 37.7 GPa. The 5D4→7F3, 7F4 and 7F5 emission transitions shift toward lower energy in the order of−4.7,−2.4 and−4.0 cm−1 GPa−1, respectively, with increasing pressure. A strong increase in the splitting of the 5D4→7F5 Stark levels with pressure is observed. The decay curves for the 5D4 level are found to be almost perfectly single exponential in the entire pressure range studied. Lifetimes of the 5D4 level are found to decrease strongly from 2564 to 886 μs when pressure is increased from ambient to 37.7 GPa. The pressure dependence of all the derived values of the present study is compared with Tb3+ in other glasses.
†This paper was presented at the XLVIth European High Pressure Research Group (EHPRG 46) Meeting, Valencia (Spain), 7–12 September, 2008.
Acknowledgements
This work has been carried out under the financial assistance of a major research project sponsored by DAE-BRNS, Government of India (No. 2007/34/25-BRNS/2415, dt. 18-01-2008). One of the authors, C.K. Jayasankar, is grateful to Department Physik, Universität Paderborn, Germany, for his stay as a Guest Scientist.
Notes
†This paper was presented at the XLVIth European High Pressure Research Group (EHPRG 46) Meeting, Valencia (Spain), 7–12 September, 2008.