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Study of growth, spectra properties and Cr4+ formation mechanism of Cr,Mg:GSGG crystal

Jiang Da-Peng Su Liang-Bi Xu Jun Tang Hui-Li Wu Feng Zheng Li-He Wang Qing-Guo Guo Xin Zou Yu-Qi

Study of growth, spectra properties and Cr4+ formation mechanism of Cr,Mg:GSGG crystal

Jiang Da-Peng, Su Liang-Bi, Xu Jun, Tang Hui-Li, Wu Feng, Zheng Li-He, Wang Qing-Guo, Guo Xin, Zou Yu-Qi
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  • Received Date:  07 May 2011
  • Accepted Date:  30 May 2011
  • Published Online:  15 March 2012

Study of growth, spectra properties and Cr4+ formation mechanism of Cr,Mg:GSGG crystal

  • 1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China;
  • 2. Graduate School of Chinese Academy of Sciences, Beijing 100049, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant Nos. 60938001, 60908030).

Abstract: Cr,Mg:GSGG crystals are successfully grown by the Czochralski method. The influences of reducing- and oxidizing- annealing treatments on the absorption spectra of Cr,Mg:GSGG crystals are investigated. From the changes of their absorption spectra, it can be inferred that the Cr4+ ions are initially generated at octahedrally coordinated sites, and then exchange positions with tetrahedral Ga3+ ions in neighboring sites under heat exciting. Differences between absorption spectra also suggest that Mg2+ ions can improve the concentration of tetrahedral Cr4+ ions.

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