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J. Phys. Soc. Jpn. 74 (2005) pp. 2181-2184  |Next Article|  |Table of Contents|
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Mixed-State Thermodynamics of Superconductors with Moderately Large Paramagnetic Effects

Hiroto Adachi, Masanori Ichioka and Kazushige Machida

Department of Physics, Okayama University, Okayama 700-8530

(Received May 13, 2005; Accepted June 13, 2005)

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 κ2 becomes an increasing function of temperature. Our results provide a natural explanation for the unusual field dependence of C seen in CeCoIn5 in terms of the paramagnetic effect. ©2005 The Physical Society of Japan

KEYWORDS: mixed state, thermodynamic quantity, paramagnetic effect, CeCoIn5
URL: http://jpsj.ipap.jp/link?JPSJ/74/2181/
DOI: 10.1143/JPSJ.74.2181


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