Abstract
The temperature dependence of the attenuation of longitudinal hypersonic waves at 9.4 GHz has been measured in 'perfect' specimens of trigonal crystals: quartz, lithium niobate and corundum. It is found that this attenuation follows a T6.5-law in the range 0.1<or= alpha (db/cm)<or=5. The results are in good qualitative agreement with the theory of Maris and Silverman, which takes into account the finite lifetime of the thermal phonons that scatter the acoustic wave.
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Schedule a callMore From: Journal of physics. Condensed matter : an Institute of Physics journal
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