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Journal Article

First-Order Superconducting Phase Transition in CeCoIn5

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Oeschler,  N.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Gegenwart,  P.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Steglich,  F.
Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Bianchi, A., Movshovich, R., Oeschler, N., Gegenwart, P., Steglich, F., Thompson, J. D., et al. (2002). First-Order Superconducting Phase Transition in CeCoIn5. Physical Review Letters, 89(13): 137002, pp. 137002-137002. doi:10.1103/PhysRevLett.89.137002.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0015-30FD-9
Abstract
The superconducting phase transition in heavy fermion CeCoIn5 (T-c=2.3 K in zero field) becomes first order when the magnetic field Hparallel to[001] is greater than 4.7 T, and the transition temperature is below T(0)approximate to0.31T(c). The change from second order at lower fields is reflected in strong sharpening of both specific heat and thermal expansion anomalies associated with the phase transition, a strong magnetocaloric effect, and a steplike change in the sample volume. This effect is due to Pauli limiting in a type-II superconductor, and was predicted theoretically in the mid- 1960s.