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We have studied optical, electrical and structural properties of the semimagnetic semiconducting ZnGeAs2 crystals, undoped and doped with 1.5, 3 and 3.5wt% Mn, which is perspective material for spintronics. We used Raman spectroscopy as a sensitive method for precise determination of crystal structure. In addition to the vibrational frequencies of a ZnGeAs2 lattice, MnAs clusters and Mn complexes,...
Efficient phosphors based on YNbO4 and doped by Eu3+, Ga3+, Al3+ were synthesized and investigated under UV, and X-ray excitation in luminescence and Raman spectroscopy. Monoclinic fergusonite crystal structure and excellent luminescent properties under X-ray excitation allow recommend these phosphors as good candidates for different applications.
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