High-pressure optical studies of LMA:V2+

Abstract

The effect of hydrostatic pressure on R line position and fluorescence lifetime tau for R line (E-2 -> (4)A(2) transition) in LMA:V2+ (LaMgAl11O19:V2+) was considered in the 0-100 kbar pressure range. Position of the R line is insensitive to pressure in the considered pressure range. Fluorescence lifetime tau linearly increases with pressure. tau has been calculated on the basis of the assumption that high pressure induces changes in compression rate k, oscillator strength f, spin-orbital coupling parameter xi and refraction index n. The calculated tau agreed well with all the experimental data in the pressure range specified. The presented model provides a possible way of producing effect of high-pressure on R line fluorescence lifetime in LMA:V2+.