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Superconductivity of tin isotopes

Published online by Cambridge University Press:  24 October 2008

J. M. Lock ,
A. B. Pippard  and
D. Shoenberg
J. M. Lock
Affiliation:
Royal Society Mond LaboratoryCambridge
A. B. Pippard
Affiliation:
Royal Society Mond LaboratoryCambridge
D. Shoenberg
Affiliation:
Royal Society Mond LaboratoryCambridge
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Abstract

Detailed measurements have been made of the superconducting transition temperatures and critical magnetic fields of the tin isotopes of mass 116, 120 and 124. The transition temperature varies with isotopic mass according to the law Tc ∞ M−n, with n = 0·462 ± 0·014, a result very similar to that already found in mercury. The critical field curves of isotopes 116 and 124 are geometrically similar, in the sense that both many be represented by the same equation, Hc/Ho = f(T/Tc), with the same ratio Ho/Tc for both. It is deduced that the electronic specific heat in normal tin varies only slowly, if at all, with isotopic mass. The variation of Tc and Ho with M is very close to that predicted by Fröhlich and Bardeen.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 47 , Issue 4 , October 1951 , pp. 811 - 819
Copyright
Copyright © Cambridge Philosophical Society 1951

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References

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