Superconducting phases of URu2Si2
- Ramirez, A.P.
- Siegrist, T.
- Palstra, T.T.M.
- Garrett, J.D.
- Bruck, E.
- Menovsky, A.A.
- Mydosh, J.A.
DOIAbstract
Thermodynamic data near the superconducting Tc on several different single-crystal specimens of the heavy-fermion system URu2Si2 are presented. Multiple-peak structure and narrow transition widths (ΔTc/Tc=0.05) are observed in the specific heat of the highest-quality samples. By carefully sectioning one of the crystals, it is shown that these peaks occur in macroscopically different parts of the crystal, and not as a result of vector superconductivity. Implications for the multiple-peak structure in UPt3 are discussed
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