Photoluminescence study of LiNbO3:Cr3+; W4+ at high pressure. Pressure dependence of spectroscopic parameters and local structure of Cr3+
Por:
Sanchez-Alejo, M. A., Rodriguez, F., Barreda-Argueso, J. A., Camarillo, I., Flores J, C., Murrieta S, H., Hernandez A, J. M., Jaque, F., Camarillo, E.
Publicada:
1 oct 2016
Resumen:
In this study, the photoluminescence properties of congruent codoped LiNbO3:Cr3+; W4+, crystals have been systematically investigated by performing photoluminescence studies at room temperature in the 0–280 kbar pressure range. In particular, we focus on the influence that hydrostatic pressure has on the 2E? 4A2 (R-lines) transitions of Cr3+. It has been observed that the pressure dependence of the spectral position of the R-lines associated with both Cr3+ centres ß and ? shows a bilinear behaviour with an abrupt slope change near 210 kbar. This change is related to the existence of a pressure-induced structural phase transition in the LiNbO3 host. The analysis of experimental results provides the Racah parameters B and C and the crystal field parameter 10Dq and their pressure and volume, through the crystal field theory and equation of state, dependences. © 2016 Elsevier B.V.
Filiaciones:
Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City, DF, Mexico
Univ Cantabria, Fac Ciencias, DCITIMAC, MALTA Consolider Team, E-39005 Santander, Spain
UAM Iztapalapa, Dept Fis, Apdo Post 55-534, Mexico City 09340, DF, Mexico
Univ Autonoma Madrid, Fac Ciencias, E-28049 Madrid, Spain
|