Ultrasonic attenuation in normal and superconducting indium

✍ Scribed by Michael Conley; Robert Reed

• Publisher: Springer US
• Year: 1981
• Tongue: English
• Weight: 781 KB
• Volume: 43
• Category: Article
• ISSN: 0022-2291
• DOI: 10.1007/bf00115609

✦ Synopsis

Measurements have been made of the ultrasonic attenuation in the normal and superconducting states of pure In single crystals. The measurements spanned the frequency range of 6-66 MHz. The data, taken in the amplitudeindependent regime, displayed the expected deviations from the BCS-type attenuation which are generally attributed to dislocation attenuation as described by Granato and Liicke. Earlier attempts to use this theory to study the amplitude-independent dislocation attenuation of ultrasound in superconductors (e.g., Mason) were generally limited to very narrow frequency ranges. These earlier results were in general agreement with the Granato and Liicke theory. However, the present multiple-frequency measurements are shown to be inconsistent with the Granato and Liicke theory.