Electronic properties of γ-U and superconductivity of U–Mo alloys

I Tkach, N.-T.H. Kim-Ngan, A D Warren, Thomas Bligh Scott, A. P. Goncalves, L. Havela

Research output: Contribution to journalArticle (Academic Journal)peer-review

25 Citations (Scopus)

Abstract

Fundamental electronic properties of γ-Uranium were determined using Mo doping combined with ultrafast (splat) cooling, which allowed stabilization of the bcc structure to low temperatures. The Sommerfeld coefficient γe is enhanced to 16 mJ/mol K2 from 11 mJ/mol K2 for α-U. Magnetic susceptibility remains weak and T-independent, ≈5 × 10−8 m3/mol. The Mo-doped γ-U exhibits a conventional BCS superconductivity with Tc ≈ 2.1 K and critical field exceeding 5 T for 15 at.% Mo. This type of superconductivity is qualitatively different from the one found for pure U splat, which has Tc higher than 1 K but the weak specific heat anomaly proves that it is not real bulk effect
Original languageEnglish
Pages (from-to)14-20
Number of pages7
JournalPhysica C: Superconductivity and its Applications
Volume498
Early online date28 Dec 2013
DOIs
Publication statusPublished - 15 Mar 2014

Keywords

  • Superconductivity
  • U–Mo alloys
  • Electronic properties

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