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

• • 上一篇    下一篇

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).

PDF (PC)

601

赞

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)