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Room temperature absorption and fluorescent emissions were investigated for Yb 3+ -doped Sc 2 O 3 , which were grown by the micro-pulling-down (μ-PD) method. The decay time for infrared Yb 3+ ( 2 F 5/2 ) fluorescence was 561μs in the case of 0.5% Yb 3+ -doped Sc 2 O 3 . It is observed that this value increases slightly when the...
Square-shaped blue single crystals of nickel-doped magnesium aluminum spinel have been pulled down from the melt, by the micro-pulling-down method. The absorption spectra of doped samples show three broad absorption bands. According to the absorption map and the chemical analysis of these crystals, the effective segregation coefficients of Ni 2+ in MgAl 2 O 4 at low doping...
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