Abstract
The preparation of single crystals of ß″-alumina containing two trivalent lanthanide species is described. The use of eutectic melts enables the two rare earth species to be introduced during a single ion exchange process. Energy transfer in crystals containing Ce +3 Nd +3 and Ce +3 Tb +3 is shown. High transfer efficiencies were measured for crystals with low sensitizer-to-activator ion concentration ratios. Up-conversion processes were observed in crystals doped with Yb +3 and Er +3 ions.
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