Abstract
Raman active phonons of Yb doped LuVO4 ranging from 0.25% to 30% are detected and analyzed at low temperature in order to determine the doping effects on the crystalline quality and the phonon contribution to the crystal-field vibronics. Also, Yb3+ ion F7∕22 and F5∕22 crystal-field energy levels are measured as a function of doping by infrared absorption and luminescence. The appropriate crystal-field Hamiltonian parameters are determined and the presence of Yb3+–Yb3+ magnetically interacting pairs, which play an important role in cooperative emission, is confirmed.
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