中国物理B ›› 2006, Vol. 15 ›› Issue (4): 854-858.doi: 10.1088/1009-1963/15/4/033

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Raman spectroscopic study of ceramic Sr2Bi4Ti5O18

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   

  1. (1)National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering,Nanjing University, Nanjing 210093, China; (2)National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, China
  • 收稿日期:2005-09-20 修回日期:2005-11-24 出版日期:2006-04-20 发布日期:2006-04-20
  • 基金资助:
    Project supported by the State Key Development Program for Basic Research of China (Grant No 001CB610404).

Raman spectroscopic study of ceramic Sr2Bi4Ti5O18

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   

  1. a National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, China; b National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China
  • Received:2005-09-20 Revised:2005-11-24 Online:2006-04-20 Published:2006-04-20
  • Supported by:
    Project supported by the State Key Development Program for Basic Research of China (Grant No 001CB610404).

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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.

关键词: Raman spectra, anharmonic potential, superposition, phonon mode

Abstract: 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.

Key words: Raman spectra, anharmonic potential, superposition, phonon mode

中图分类号: 

  • 77.84.Dy
61.05.cp (X-ray diffraction) 63.20.Ry (Anharmonic lattice modes) 77.80.-e (Ferroelectricity and antiferroelectricity) 78.30.Hv (Other nonmetallic inorganics)