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Mixed-State Thermodynamics of Superconductors with Moderately Large Paramagnetic Effects

H. Adachi·M. Ichioka·K. Machida
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Abstract

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 $κ_2$ 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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H. Adachi, M. Ichioka, K. Machida. 2005-09-25. Mixed-State Thermodynamics of Superconductors with Moderately Large Paramagnetic Effects. https://doi.org/10.1143/jpsj.74.2181

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