Journal of Pure and Applied Ultrasonics

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Ultrasonic Attenuation in Alkaline Earth Metals


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1 Department of Physics, Banaras Hindu University, Varanasi-221005, India
 

Ultrasonic attenuation due to electron-phonon interaction and phonon-phonon interaction has been studied in alkaline-earth metals from 4.2 K to 400 K for longitudinal and shear waves. Phonon-viscosity has also been evaluated due to screw and edge dislocations. It has been found that in these metals electron-phonon interaction is the principal cause of the attenuation of the ultrasonic waves at low temperatures while phonon-phonon interaction is the dominant cause of the ultrasonic attenuation at higher temperatures i.e. 50 K and above. PACS Number : 62.20 DC, 62.65+K.
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  • Ultrasonic Attenuation in Alkaline Earth Metals

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Authors

R. K. Singh
Department of Physics, Banaras Hindu University, Varanasi-221005, India

Abstract


Ultrasonic attenuation due to electron-phonon interaction and phonon-phonon interaction has been studied in alkaline-earth metals from 4.2 K to 400 K for longitudinal and shear waves. Phonon-viscosity has also been evaluated due to screw and edge dislocations. It has been found that in these metals electron-phonon interaction is the principal cause of the attenuation of the ultrasonic waves at low temperatures while phonon-phonon interaction is the dominant cause of the ultrasonic attenuation at higher temperatures i.e. 50 K and above. PACS Number : 62.20 DC, 62.65+K.