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Measurements of gap anisotropy in A15 Nb/sub 3/Sn

Journal Article · · Phys. Rev. Lett.; (United States)
A recent suggestion by Farrel and Chandrasekhar that a major part of the critical-temperature (T/sub c/) reduction in A15 superconductors, caused by radiation-induced defects, is a manifestation of a large gap anisotropy is examined for Nb/sub 3/Sn. Electron-irradiation data show that the T/sub c/ changes with damage are inconsistent with a large gap anisotropy. However, if one assumes that the initial changes in T/sub c/ with fluence are indeed due to gap anisotropy, then it is shown that the anisotropy parameter < a/sup 2/ > for Nb/sub 3/Sn is 9 or approx. = 0.03.
Research Organization:
Brookhaven National Laboratory, Upton, New York 11973
OSTI ID:
7278868
Journal Information:
Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 39:17; ISSN PRLTA
Country of Publication:
United States
Language:
English