Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 74, Issue 8, Pages 2181-2184Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.74.2181
Keywords
mixed state; thermodynamic quantity; paramagnetic effect; CeCoIn5
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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 CeCoIn5 in terms of the paramagnetic effect.
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