PHONON INTERFERENCE IN BATIO3 - HIGH-PRESSURE RAMAN-STUDY

被引：70

作者：

SOOD, AK

CHANDRABHAS, N

MUTHU, DVS

JAYARAMAN, A

机构：

[1] JAWAHARLAL NEHRU CTR ADV SCI RES,BANGALORE 560064,KARNATAKA,INDIA

[2] UNIV HAWAII MANOA,HAWAII INST GEOPHYS,HONOLULU,HI 96822

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.51.8892

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Raman experiments have been carried out on single crystals of BaTiO3 as a function of pressure up to 3.5 GPa across the ferroelectric (tetragonal) to paraelectric (cubic) phase transition. The unusual features in the Raman spectra associated with the interference effects due to coupling of the three A1(TO) phonons are studied quantitatively to obtain the pressure dependence of the line shape parameters and the coupling constants. The frequencies of the middle and highest-frequency modes as well as the linewidth of the middle mode show interesting pressure dependence. © 1995 The American Physical Society.

引用

页码：8892 / 8896

页数：5

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