Spectra Analysis of a Novel Ti-Doped LiAlO2 Single Crystal
ZOU Jun, ZHOU Sheng-Ming, LI Yang, WANG Jun, ZHANG Lian-Han, XU Jun
1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
2Graduate School of Chinese Academy of Sciences, Beijing 100049
Spectra Analysis of a Novel Ti-Doped LiAlO2 Single Crystal
ZOU Jun;ZHOU Sheng-Ming;LI Yang;WANG Jun;ZHANG Lian-Han;XU Jun
1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
2Graduate School of Chinese Academy of Sciences, Beijing 100049
Abstract： LiAlO2 single crystals doped with Ti at concentration 0.2 at.% are grown by the Czochralskl technique with dimensions Ф42×55mm. Ti ions in the crystal are quadrivalence proven by comparing the absorption and fluorescence spectra of pure LiAlO2 and Ti: LiAlO2. After air and Li-rich atmosphere annealing, the absorption peaks in the range of 600--800nm disappear. We conclude that 682 and 756nm absorption peaks are attributed to the VLi and V0 absorptions, respectively. The peaks at 716nm and 798nm may stem from the VLi+ and F+ absorptions. The colour-centre model can be applied to explain the experimental phenomena. Ti4+-doping produces more lithium vacancies in the LiAlO2 crystal. The intensities of [LiO4] and the associated bonds remain unchanged, which improves the anti-hydrolyzation and thermal stability of LiAlO2 crystals.
ZOU Jun;ZHOU Sheng-Ming;LI Yang;WANG Jun;ZHANG Lian-Han;XU Jun. Spectra Analysis of a Novel Ti-Doped LiAlO2 Single Crystal[J]. 中国物理快报, 2005, 22(10): 2622-2625.
ZOU Jun, ZHOU Sheng-Ming, LI Yang, WANG Jun, ZHANG Lian-Han, XU Jun. Spectra Analysis of a Novel Ti-Doped LiAlO2 Single Crystal. Chin. Phys. Lett., 2005, 22(10): 2622-2625.
2005, Vol. 22 
