Revision of the Phase Diagram of Superconducting U1−xThxBe13
F. Kromer, R. Helfrich, M. Lang, F. Steglich, C. Langhammer, A. Bach, T. Michels, J. S. Kim, G. R. Stewart
DOI 10.1103/PhysRevLett.81.4476 · Physical Review Letters
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Abstract
Low-temperature specific-heat and thermal-expansion measurements on a single crystal of the heavy-fermion superconductor UBe13 reveal an anomaly in the superconducting state. The evolution of this feature is studied as a function of Th doping on several U1−xThxBe13 polycrystals ( x≤0.03), giving rise to a new “line of anomalies,” TLx, in the T−x diagram. The anomaly at TL(x) marks the precursor of the lower of the two phase transitions at x>xcr≈0.019. Implications for the interpretation of the phase diagram of superconducting U1−xThxBe13 are addressed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| UBe13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.898 | Pressure unresolved | midpoint |
| UBe13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.9 | Pressure unresolved | onset |
| U0.99Th0.01Be13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.8 | Pressure unresolved | unknown |
| U0.983Th0.017Be13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.6 | Pressure unresolved | unknown |
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