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采用助熔剂法,以CaCl2为助熔剂,生长Cr4+ :Ca2GeO4新型近红外可调谐激光晶体.通过X射线衍射(XRD)、激光Raman光谱、X射线光电子能谱(XPS)等方法对晶体进行结构表征.结果表明,得到的晶体为单斜晶系镁橄榄石结构的低温γ-Cr4+ :Ca2GeO4单晶,晶格参数为a=5.3209 (1 =0.1 nm)
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关键词:
- Cr4+ :Ca2GeO4激光晶体 /
- X射线衍射 /
- Raman光谱 /
- X射线光电子能谱
A new kind of Cr4+ :Ca2GeO4 infrared tunable laser crystals were synthesized by flux growth method with CaCl2 as solvent. The structure of Cr4+ :Ca2GeO4 was characterized by x ray diffraction, Raman spectroscopy (RS) and x ray photoelectron spectroscopy(XPS). The results showed that the obtained crystal was γ-Cr4+ :Ca2GeO4 single crystal with monoclinic structure belonging to olivine structure, and the lattice parameters are: a=5.3209 (1 =0.1 nm), b=6.6648 , c=11.2606 . The result that (GeO4)4- exists in the crystal was verified by RS measurement and its vibration was determined. We can see from the XPS measurement that Cr in the crystal is in the form of Cr4+ and no other valence states exist.-
Keywords:
- Cr4+ :Ca2GeO4 laser crystal /
- x ray diffraction /
- Raman spectra /
- x ray photoelectron spectroscopy
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中国物理学会期刊
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