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A highly transparent Eu~(3+)-doped CaGdAlO_4(CGA) single crystal is grown by the floating zone method.The segregation coefficient,x ray diffraction,and x ray rocking curve are detected,and the results reveal that the single crystal is of high quality.The f –f transitions of Eu~(3+) in the host lattice are discussed.The ~5D_0–~7F_2 emission transition at 621 nm(red light) is dominant over the ~5D_0–~7F_1 emission transitions at 591 and 599 nm(orange light),agreeing well with the random crystal environment of Eu~(3+) ions in a CGA crystal.The decay time of Eu:~5D_0 is measured to be 1.02 ms.All the results show that the Eu:CGA crystal has good optical characterization and promises to be an excellent red-fluorescence material.
A highly transparent Eu ~ (3 +) - doped CaGdAlO_4 (CGA) single crystal is grown by the floating zone method. The segregation coefficient, x ray diffraction, and x ray rocking curve are detected, and the results reveal that the single crystal is of high quality. The f-f transitions of Eu ~ (3+) in the host lattice are discussed. ~ 5D_0- ~ 7F_2 emission transition at 621 nm (red light) is dominant over the ~ 5D_0- ~ 7F_1 emission transitions at 591 and 599 nm (orange light), agreeing well with the random crystal environment of Eu ~ (3+) ions in a CGA crystal. The decay time of Eu: ~ 5D_0 is measured to be 1.02 ms.All the results show that the Eu: CGA crystal has good optical characterization and promises to be excellent red-fluorescence material.