Magnetism and superconductivity in U2PtxRh1-xC2

Wakeham, N.; Ni, Ni; Bauer, E. D.; Thompson, J. D.; Tegtmeier, E.; Ronning, F.

doi:10.1103/PhysRevB.91.024408

Magnetism and superconductivity in $U_{2} {Pt}_{x} {Rh}_{1 - x} C_{2}$

Journal Article · Fri Jan 09 00:00:00 EST 2015 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.91.024408· OSTI ID:1193289

Wakeham, N. ^[1]; Ni, Ni ^[2]; Bauer, E. D. ^[1]; Thompson, J. D. ^[1]; Tegtmeier, E. ^[1]; Ronning, F. ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of California, Los Angeles, CA (United States)

We report the phase diagram of the doping series U₂Pt_xRh_(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 T_c increasing with increasing x. The reduction in T_c and increase in residual resistivity with decreasing Pt content is inconsistent with the extension of the Abrikosov-Gor'kov theory to unconventional superconductivity.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1193289

Alternate ID(s):: OSTI ID: 1180033

Report Number(s):: LA-UR--14-27815

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 2 Vol. 91; ISSN 1098-0121; ISSN PRBMDO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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