中国物理B ›› 2006, Vol. 15 ›› Issue (4): 854-858.doi: 10.1088/1009-1963/15/4/033
张善涛1, 卢明辉1, 顾正彬1, 陈延峰1, 杜朝玲2, 程光煦2, 王佳2
Du Chao-Ling (杜朝玲)a, Zhang Shan-Tao (张善涛)b, Lu Ming-Hui (卢明辉)b, Gu Zheng-Bin (顾正彬)b, Cheng Guang-Xu (程光煦)a, Wang Jia (王佳)a, Chen Yan-Feng (陈延峰)b
摘要: Raman spectra of ceramic Sr2Bi4Ti5O18 (SBTi5) are reported to consist of four different Raman bands.Temperature-dependent spectra reveal the relationship between the lattice vibration and the material's structure. There appears a relatively large change in structure of the material at about 273K.The anharmonic potential of the material has a great influence on its phonon mode full width at half maximum (FWHM), which can be expressed by a function of temperature. Theoretical fittings of the FWHMs for the two modes at around 312\,cm-1 and 464\,cm-1 indicate that the latter phonon mode is more anharmonic than the former one.
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