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Title: Magnetism and superconductivity in U 2 Pt x Rh 1 - x C 2

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
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  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of California, Los Angeles, CA (United States)

We report the phase diagram of the doping series U₂PtxRh(1–x)C₂, studied through measurements of resistivity, specific heat, and magnetic susceptibility. The Néel temperature of U₂Rh₂C₂ of ~ 22 K is suppressed with increasing Pt content, reaching zero temperature close to x = 0.7, where we observed signatures of increased quantum fluctuations. Additionally, evidence is presented that the antiferromagnetic state undergoes a spin-reorientation transition upon application of an applied magnetic field. This transition shows non-monotonic behavior as a function of x, peaking at around x = 0.3. Superconductivity is observed for x ≥ 0.9, with Tc increasing with increasing x. The reduction in Tc and increase in residual resistivity with decreasing Pt content is inconsistent with the extension of the Abrikosov-Gor'kov theory to unconventional superconductivity.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1193289
Alternate ID(s):
OSTI ID: 1180033
Report Number(s):
LA-UR-14-27815; PRBMDO
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 91, Issue 2; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

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Cited By (2)

Unconventional superconductivity journal April 2017
Unconventional superconductivity journal November 1995

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