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- Title
Ultrasonic attenuation in a LiIO<sub>3</sub> crystal.
- Authors
Pirozerskiĭ, A. L.; Charnaya, E. V.
- Abstract
The temperature dependences of the attenuation of longitudinal acoustic waves along the x axis of a LiIO3 crystal are studied experimentally by the method of Bragg diffraction of light by ultrasound. The measurements are performed in the temperature range from 215 to 335 K at frequencies of 400–690 MHz. Above 260 K, the attenuation is found to exhibit a frequency-independent growth of a relaxational character, which is used to calculate the enthalpy of the activation of ionic motion in the direction normal to the hexagonal axis. In addition, resonance attenuation peaks are observed; as the frequency increases, the peaks are shifted toward lower temperatures. A phenomenological model is proposed to explain the origin of the resonance absorption.
- Subjects
ULTRASONIC wave attenuation; SOUND waves; ATTENUATION (Physics); ACOUSTIC surface waves; OPTICAL diffraction
- Publication
Acoustical Physics, 2006, Vol 52, Issue 1, p77
- ISSN
1063-7710
- Publication type
Article
- DOI
10.1134/S1063771006010106