Field-dependent specific heat and multiple superconducting phases in UPt3
B. Ellman, J. Yang, T. F. Rosenbaum, E. Bucher
DOI 10.1103/PhysRevLett.64.1569 · Physical Review Letters
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Abstract
We have measured the specific heat, C, of single-crystal UPt3 in the superconducting regime as a function of temperature, T, and magnetic field, H, parallel to the c axis. We find that C(T) at fixed H<Hc2 shows no evidence for different superconducting states. In contrast, our field-sweep data, C(H) at fixed T, have sharp changes in slope at H≊Hc2/2. The phase diagram deduced from these features agrees with neutron-scattering and torsional-oscillator results on the same samples. These thermodynamic measurements as a function of magnetic field constrain theories of exotic superconductivity in UPt3.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.485 | Pressure not reported | onset |
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