Suppression of Superconductivity in UPt_3 Single Crystals

Abstract

High quality single crystals of UPt_3 have been prepared by vertical float-zone refining in ultra-high vacuum. We find that the superconducting transition temperature can be varied systematically by annealing, revealing that the transition temperature intrinsic to UPt_3 is 563 +/- 5 mK. The suppression of the superconducting transition from defects is consistent with a modified Abrikosov-Gor'kov formula that includes anisotropic pairing, Fermi surface anisotropy, and anisotropic scattering by defects.

4 pages, 4 figures in postscript. To appear in Phys. Rev. B 58 (July 1, 1998)

References in corpus (2)

• The Order Parameter for the Superconducting Phases of UPt${}_3$
• Thermal Conductivity and Gap Structure of the Superconducting Phases of UPt3

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• Pairing Fluctuation Corrections to the Kinetic Theory of Liquid ${}^3\mathrm{He}$