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J. H. Mun,A. Jouini,A. Yoshikawa,Lyon1 University,T. Fukuda,J. S. Lee 한양대학교 세라믹연구소 2013 Journal of Ceramic Processing Research Vol.14 No.5
Undoped and (0, 0.5, 5 mol%) Lu2O3 single crystals were grown by the micro-pulling-down method. Crystals were transparent with yellowish color with 4.2 mm in diameter and 6-9 mm in length. Yb-doped Lu2O3 single crystals have a good compositional homogeneity along the growth axis. Both, thermal diffusivity and heat capacity decrease when the Yb concentration increase. As a result, the calculated thermal conductivity for 5 mol% Yb3+-doped Lu2O3 decreases from 14.32 to 12.42 Wm−1 K−1 . We have also investigated the absorption, fluorescence spectra and measured fluorescence lifetimes as a function of the Yb content.