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Effect of doping on the ultrasonic attenuation in the intermediate state of superconductors

โœ Scribed by K. D. Chaudhuri; R. Singh

Publisher
Springer US
Year
1979
Tongue
English
Weight
479 KB
Volume
36
Category
Article
ISSN
0022-2291

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โœฆ Synopsis

The attenuation of longitudinal ultrasonic waves has been measured in single crystals of indium (99.999%) and of indium doped with 0.003 at % of tin in the intermediate state over tize frequency range 10-30 MHz. Two phases have been identified in the superconducting layers. The fundamental frequency for one phase is approximately constant in both the specimens for the same field, but increases appreciably with the increase in the magnetic field from O. 7 Hc to 0.9 He; the vo value for the other phase, on the other hand, increases with increase in the concentration of the dopant and is independent of the magnetic field. The origin of the two phases is discussed.

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