Abstract
BaLiF 3 crystals doped with transition metal ions are potential new laser active media. These crystals present an ‘inverse’ perovskite structure where the Ni 2+ ions are located in octahedral sites. In this work, the temperature dependence of the fluorescence lifetime of nickel ions in the fluoperovskite BaLiF 3 is reported. The lifetime at low temperatures is constant, dropping slowly above 240 K. From the experimental data, the radiative decay time ( τ = 4.8(1) ms), the temperature independent nonradiative decay time (0, 014(4) ms), and the thermal quenching activation energy ( ΔE = 1270(64) cm −1) are determined. Excellent agreement with the Mott model is then demonstrated by using these parameters.
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