Photoluminescence study of LiNbO 3 :Cr 3+ ; W 4+ at high pressure. Pressure dependence of spectroscopic parameters and local structure of Cr 3+
| Autor: | M.A. Sánchez-Alejo, F. Rodríguez, J.A. Barreda-Argüeso, I. Camarillo, C. Flores J., H. Murrieta S., J.M. Hernández A., F. Jaque, E. Camarillo |
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| Rok vydání: | 2016 |
| Předmět: |
Equation of state
Photoluminescence Field (physics) Condensed matter physics Chemistry Organic Chemistry Hydrostatic pressure Lithium niobate 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Inorganic Chemistry Crystal chemistry.chemical_compound Crystallography Volume (thermodynamics) Crystal field theory 0103 physical sciences Electrical and Electronic Engineering Physical and Theoretical Chemistry 010306 general physics 0210 nano-technology Spectroscopy |
| Zdroj: | Optical Materials. 60:94-100 |
| ISSN: | 0925-3467 |
| DOI: | 10.1016/j.optmat.2016.07.013 |
| Popis: | 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 β and γ 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. |
| Databáze: | OpenAIRE |
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