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Phys. Rev. B 58, R603–R606 (1998)

Suppression of superconductivity in UPt3 single crystals

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J. B. Kycia
Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208

J. I. Hong
Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208

M. J. Graf* and J. A. Sauls
Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208

D. N. Seidman
Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208

W. P. Halperin
Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208

Received 24 March 1998; published in the issue dated 1 July 1998

High-quality single crystals of UPt3 have been prepared by vertical float-zone refining in ultrahigh vacuum. We find that the superconducting transition temperature can be varied systematically by annealing, revealing that the transition temperature intrinsic to UPt3 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.

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.58.R603
DOI:
10.1103/PhysRevB.58.R603
PACS:
74.70.Tx, 74.25.-q, 74.62.Dh

*Present address: Center for Materials Science, Los Alamos National Laboratory, Los Alamos, NM.

 
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