Superconductivity in U-T Alloys (T = Mo, Pt, Nb, Zr) Stabilized in the Cubic γ-U Structure
S. Sowa a, N.-T.H. Kim-Ngan a, M. Krupska a, M. Paukov b, I. Tkach b and L. Havela b
aInstitute of Physics, Pedagogical University, Podchorążych 2, 30-084 Kraków, Poland
bFaculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 12116 Prague, Czech Republic
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Using ultrafast cooling (with the cooling rate up to 106 K/s) helps to minimize the T-alloying concentration (T = Mo, Pt, Pd, Nb, Zr) necessary to retain the γ-U phase down to low temperatures. All investigated splat-cooled U-T alloys become superconducting with Tc in the range of 0.61-2.11 K. The bulk character of superconductivity can be concluded for some of the splats when comparing the specific-heat anomaly at Tc with the BCS theory prediction.

DOI: 10.12693/APhysPolA.130.521
PACS numbers: 81.05.Bx, 74.70.Ad, 72.15.Cz