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Pressure induced frequency shifts of laser excited fluorescence comparable to those observed in ruby have been measured in samarium doped yttrium aluminum garnet (Sm:YAG) at pressures approaching 40 kbar and temperatures to 700°C. In contrast to the behaviour of ruby, Sm:YAG fluorescence exhibits a negligible temperature dependence making this material an ideal candidate for pressure calibration of diamond anvil cells at elevated temperatures.
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Hess et al. (1989) studied this question.
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