Mixed-State Thermodynamics of Superconductors with Moderately Large Paramagnetic Effects

Details Mixed-State Thermodynamics of Superconductors with Moderately Large Paramagnetic Effects Mixed-State Thermodynamics of Superconductors with Moderately Large Paramagnetic Effects

2005-03-11

arxiv.org/abs/cond-mat/0503265v2

Physics

Condensed Matter

Superconductivity

Published in J. Phys. Soc. Jpn. 74, 2181 (2005)

Scientific paper

10.1143/JPSJ.74.2181

Effects of Pauli paramagnetism on thermodynamic quantities in a vortex state, such as the specific heat $C$ and magnetization $M$, are studied using the quasiclassical Eilenberger formalism. We demonstrate that with an increase of paramagnetic depairing effect, the sigh of the curvature of the field dependence of $C$ changes from negative to positive, and that the Maki parameter $\kappa_2$ becomes an increasing function of temperature. Our results provide a natural explanation for the unusual field dependence of $C$ seen in CeCoIn$_5$ in terms of the paramagnetic effect.

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