Superconducting phase transitions in mK temperature range in splat-cooled U^sub 0.85^Pt^sub 0.15^ alloys

We present the temperature and magnetic-field dependence of the electrical resistivity (ρ(T,B)) in the mK temperature range used as a diagnostic tool for the superconductivity of U-Pt alloys prepared by splat-cooling technique. In most of the investigated alloys, a single resistivity drop was observ...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2018-05, Vol.536, p.708
Main Authors: Kim-Ngan, N-TH, Tarnawski, Z, Chrobak, M, Sowa, S, Duda, A, Paukov, M, Buturlim, V, Havela, L
Format: Article
Language:English
Subjects:
Alloys
Cooling rate
Crystal structure
Diagnostic software
Diagnostic systems
Electrical resistivity
Phase transitions
Platinum base alloys
Superconductivity
Temperature dependence
Temperature effects
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Summary:We present the temperature and magnetic-field dependence of the electrical resistivity (ρ(T,B)) in the mK temperature range used as a diagnostic tool for the superconductivity of U-Pt alloys prepared by splat-cooling technique. In most of the investigated alloys, a single resistivity drop was observed at the superconducting transition. For splat-cooled U0.85Pt0.15 (U-15 at% Pt) alloys, two drops were revealed around 0.6 K and 1 K tentatively attributed to the superconducting phase transitions of the γ-U phase and α-U phase. The ρ(T,B) characteristics were found to depend on the cooling rate. The superconductivity is characterized by very high upper critical fields, reaching 4.5 T in the 0 K limit.
ISSN:0921-4526
1873-2135