First-Order Superconducting Phase Transition in CeCoIn5
A. Bianchi, R. Movshovich, N. Oeschler, P. Gegenwart, F. Steglich, J. D. Thompson, P. G. Pagliuso, J. L. Sarrao
DOI 10.1103/PhysRevLett.89.137002 · Physical Review Letters
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Abstract
The superconducting phase transition in heavy fermion CeCoIn5 (Tc=2.3 K in zero field) becomes first order when the magnetic field H∥[001] is greater than 4.7 T, and the transition temperature is below T0≈0.31Tc. 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CeCoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.3 | Pressure unresolved | unknown |
| CeCoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.3 | Pressure unresolved | unknown |
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