Cryst. Res. Technol. 34 1999 2 255-260 Rare earth doped scandia and yttria have been grown from rhenium crucibles by the Czochralski technique -to our knowledge for the first time. Spectroscopic data of Yb:Sc 2 O 3 are presented in detail and first laser experiments are reported. Despite the rather high crystal losses of about 2 % a slope efficiency of 37 % was obtained under diode pumping.
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