2004 年 31 巻 3 号 p. 233-
Rare-earth garnet, Y_3Al_5O_<12>, doped with Cr_2O_3, crystals are found to be useful as a sensor material for a fiber-optic fluorescence thermometer. Temporal characteristics of fluorescence from Cr doped Y_3Al_5O_<12> crystals are quite comparable to that of ruby (Cr doped Al_2O_3) crystal.