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

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.