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The penetration depth in impure superconducting tin

Published online by Cambridge University Press:  24 October 2008

R. G. Chambers  and
A. B. Pippard
R. G. Chambers
Affiliation:
Royal Society Mond Laboratory Cambridge
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Abstract

A new method is described for measuring the surface impedance of metals at low temperatures and at radio-frequencies. Using this method, the surface impedance of normal tin and the penetration depth λ in superconducting tin have been studied at about 9 Mc/s frequency as a function of impurity content. The measured surface impedances agree well with the values expected, and the penetration depths increase with impurity content, in confirmation of Pippard's observations (14) at 9400 Mc/s. The variation of λ with reduced temperature t is well represented by the equation λ/λ0 = (1 − t4)−½, in impure as well as in pure tin. The absolute value of λ found for pure tin is about 4 × 10−6 cm., significantly lower than the values previously found.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 52 , Issue 2 , April 1956 , pp. 363 - 375
Copyright
Copyright © Cambridge Philosophical Society 1956

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References

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