Critical fields and Landau-Ginzburg parameters of the heavy-fermion superconductor UPt₃

Authors

Zuyu Zhao, Northwestern University
F. Behroozi, Northwestern University
Shireen Adenwalla, University of Nebraska-LincolnFollow
Y. Guan, Northwestern University
J. B. Ketterson, Northwestern UniversityFollow

Date of this Version

1991

Citation

PHYSICAL REVIEW B VOLUME 43, NUMBER 16, 1 JUNE 1991

Comments

Copyright 1991 The American Physical Society

Abstract

Measurements of both the lower and upper critical fields along all three principal axes of the heavy-fermion superconductor UPt₃ have been performed. A kink in the temperature dependence of the lower critical field, H_ci, is observed for all three orientations, which is in agreement with a recent theory by Hess, Tokuyasu, and Sauls. Also, an anisotropy of the temperature dependence of the lower critical field is observed at low temperatures (T <290 >mK). The Landau-Ginzburg parameters are estimated from the experimental results.