X-ray Bragg diffraction from langasite crystal modulated by surface acoustic wave
X-ray Bragg diffraction from langasite crystal modulated by surface acoustic wave
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DOI：
10.1063/1.1619199
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发表时间：
2003-11-15
影响因子：
3.2
通讯作者：
Buzanov, OA
中科院分区：
文献类型：
--
作者：
Roshchupkin, DV;Irzhak, DV;Buzanov, OA
在ESRF同步辐射源上，研究了受波长为12微米的瑞利表面波(SAW)调制的La3Ga5SiO14单晶X截面的X射线衍射。由于SAW衍射对晶格的正弦调制作用，卫星出现在摇摆曲线上，其数目、角位置和强度取决于超声超晶格的幅度和波长。可以通过调整声幅来实现特定卫星的完全消光。结果表明，X射线衍射法可以用来研究晶体中的表面声波波场分布。(C)2003年美国物理研究所。
X-ray diffraction on the X cut of a langasite crystal (La3Ga5SiO14) modulated by a Lambda=12 mum Rayleigh surface acoustic wave (SAW) has been studied at the ESRF synchrotron radiation source. Due to the sinusoidal modulation of the crystal lattice involved by the SAW diffraction satellites appear on the rocking curve, with their number, angular positions, and intensities depending on the amplitude and wavelength of the ultrasonic superlattice. Full extinction of a specific satellite could be performed by adjusting the acoustic amplitude. It is shown that x-ray diffraction can be used to study surface acoustic wave field distributions in crystals. (C) 2003 American Institute of Physics.