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- W2065442021 abstract "Abstract Photoluminescent and excitation spectra of MgGa 2 O 4 with 0.1, 0.5, 1.0 and 5.0% Cr 3+ were studied at room temperature and 77 K. The samples exhibit broad emission bands in visible and near-infrared regions, associated with octahedral Cr 3+ ions. The luminescence integrated intensity increases with concentration between 0.1 and 0.5% Cr 3+ . For higher concentrations, the luminescence integrated intensity decreases. The 5.0% Cr 3+ sample luminescence is almost 50 times weaker than the emission of the 0.5% sample. The luminescence as a function of wavelength excitation and Cr 3+ doping level shows different shapes, making evident that there exist several site types for Cr 3+ on those samples. From the spectra, the energy transitions were identified. The crystal field Dq and Racah parameter B were obtained with the help of Tanabe–Sugano matrices." @default.
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- W2065442021 date "2010-03-01" @default.
- W2065442021 modified "2023-10-14" @default.
- W2065442021 title "Cr3+ impurity concentration and excitation dependences of magnesium gallate spinel photoluminescent data" @default.
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- W2065442021 doi "https://doi.org/10.1016/j.jallcom.2009.11.071" @default.
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