ULTRASONIC INVESTIGATION IN KTAO3

被引：6
|
作者：
DEORANI, SC [1 ]
NAITHANI, UC [1 ]
SEMWAL, BS [1 ]
机构：
[1] UNIV GARHWAL,DEPT PHYS,SRINAGAR 246174,INDIA
来源：
PRAMANA-JOURNAL OF PHYSICS | 1990年 / 35卷 / 02期
关键词：
62.80; anharmonicity; Curie temperature; Displacive ferroelectrics; Green's function; phase transition;
D O I：
10.1007/BF02875292
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The anomalous ultrasonic attenuation α c of longitudinal waves propagating along (100) direction in KTaO3 has been analyzed above the phase transition temperature in the frequency range 150-300 MHz in the paraelectric phase. The attenuation of longitudinal ultrasonic waves in KTaO3 is primarily due to a strong interaction with thermally-excited phonons in the soft mode. Frequency and temperature variations of attenuation are discussed. © 1990 Indian Academy of Sciences.
引用
收藏
页码：181 / 186
页数：6
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