Pressure-induced changes in the energetic structure of the 3d~3 ions in solid matrices

摘要

The results of high-pressure spectroscopy of Cr~(3+) and Mn~(4+) ions in solids are revised. We discuss the influence of external pressure on compression of ion-ligands systems, pressure-induced ~4T_2-~2E level crossover, R-lines pressure shift and influence of pressure on the R-lines emission lifetime. The model of energetic structure of the octahedrally coordinated 3d~3 ion that includes electron-phonon and spin-orbit interaction is considered and used for interpretation of the results of high-pressure spectroscopy, especially for quantitative analysis of lattice disorder and crystal field distribution in crystal.