Pressure dependence of spin-orbit levels of Co2+ in KZnF3

Low temperature emission measurements were performed at atmospheric and hig h pressures in KZnF3:Co2+. Comparing the zero-phonon line positions and usi ng the phonon dispersion relation of the host material, the fine structure in the emission spectrum was identified. Pressure coefficients were obtaine d for several among the emission lines from which the values for zero-phono n lines were deduced. Analysis shows that the spin-orbit parameter changes with pressure are negligible in this material. (C) 1999 American Institute of Physics. [S0021-9606(99)70608-2].