Mechanical Measurements of the Flux Lattice in the Heavy-Fermion Superconductor UPt3
R. N. Kleiman, P. L. Gammel, E. Bücher, D. J. Bishop
DOI 10.1103/PhysRevLett.62.328 · Physical Review Letters
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Abstract
We report mechanical measurements of the flux lattice in UPt3. In the superconducting state the flux lattice that is formed in the sample when a magnetic field is applied contributes a restoring force and a dissipation term to a high-Q mechanical oscillator, when the oscillator and sample are tilted with respect to the static magnetic field. In addition to the characteristic response for a type-II superconductor that gives Hc2(T), we observe an unexpected dissipation peak along two lines in the (H, T) plane within the superconducting state. The evidence suggests transitions between three different superconducting phases, and hence a complex phase diagram for UPt3 is proposed.
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. | 0.53 | Pressure not reported | onset |
| UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.53 | Pressure not reported | onset |
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