The Raman Spectra of LiNbO3:MgO (6.7 mol%) at both low temperature and room temperature were studied. The results showed that the crystal structure has changed little after doping Mg+ +. At room temperature the lattice distorted a little, which caused the appearance of coupling phenomenon of some individual scattering peaks. As the temperature decreased, the coupling reduced gradually.
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Chan et al. (2001) studied this question.
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