High pressure luminescence study of Sm3+: K-Ba-Al fluorophosphate glass

• Published in: High pressure research Vol. 30; no. 3; pp. 424 - 427
• Main Authors: Jayasankar, C. K., Jyothi, L., Basavapoornima, Ch, Tröster, Th, Sievers, W., Wortmann, G.
• Format: Journal Article
• Language: English
• Published: Taylor & Francis 01-09-2010
• Subjects: crystal-field effects; Decay; Doppler effect; Glass; high pressure; ions in glass; Luminescence; Mathematical models; optical properties; Red shift; Spectra; Splitting
• ISSN: 0895-7959; 1477-2299
• DOI: 10.1080/08957951003756392

The luminescence spectra and decay curves for the
4
G
5/2
level of Sm
3+
ions in 55.95P
2
O
5
+14K
2
O+6KF+14.95BaO+9Al
2
O
3
+0.1Sm
2
O
3
glass, referred to as PKFBASm01, have been studied as a function of pressure up to 40.5 GPa at room temperature. With the increase in pressure, a continuous red shift of the
4
G
5/2
→
6
H
9/2, 7/2, 5/2
transitions and a progressive increase in the magnitude of the crystal-field splittings for these transitions are observed. The decay curves for the
4
G
5/2
level of the Sm
3+
ions in PKFBASm01 glass are found to exhibit single exponential behavior at ambient pressure and become non-exponential at higher pressures, accompanied by shortening of lifetimes. A generalized Yokoto-Tanimoto model has been used to explain the pressure-induced non-exponential nature of the decay curves.