Thermodynamics of the UPt₃ superconducting phase diagram

Authors

Shireen Adenwalla, University of Nebraska-LincolnFollow
J. B. Ketterson, Northwestern UniversityFollow
S. K. Yip, Northwestern University
S. W. Lin, University of Wisconsin - Milwaukee
M. Levy, University of Wisconsin - Milwaukee
Bimal K. Sarma, University of Wisconsin - Milwaukee

Document Type

Article

Date of this Version

1992

Citation

Physical Review B, Volume 46, Number 14, October 1992

Comments

Copyright 1992 The American Physical Society

Abstract

In this paper we present a thermodynamic analysis of the UPt₃ superconducting phase diagram in the H-T plane. The analysis relates the specific-heat jumps to the slopes of the four phase-transition lines. The existing data are found to be in good mutual agreement, and consistent with the assumption that the inner phase-transition line at low field, T_c*, is second order for both Ĥll ĉ and Ĥll ĉ. For Ĥllĉ, the inner phase-transition line at higher field, H_FL, is first order albeit with a small latent heat. For Ĥll ĉ, it can be second order.