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

Abstract

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.

Authors:
 [1];  [2];  [1];  [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of California, Los Angeles, CA (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1193289
Alternate Identifier(s):
OSTI ID: 1180033
Report Number(s):
LA-UR-14-27815
Journal ID: ISSN 1098-0121; PRBMDO
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 2; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Wakeham, N., Ni, Ni, Bauer, E. D., Thompson, J. D., Tegtmeier, E., and Ronning, F. Magnetism and superconductivity in U2PtxRh1-xC2. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.91.024408.
Wakeham, N., Ni, Ni, Bauer, E. D., Thompson, J. D., Tegtmeier, E., & Ronning, F. Magnetism and superconductivity in U2PtxRh1-xC2. United States. doi:10.1103/PhysRevB.91.024408.
Wakeham, N., Ni, Ni, Bauer, E. D., Thompson, J. D., Tegtmeier, E., and Ronning, F. Fri . "Magnetism and superconductivity in U2PtxRh1-xC2". United States. doi:10.1103/PhysRevB.91.024408. https://www.osti.gov/servlets/purl/1193289.
@article{osti_1193289,
title = {Magnetism and superconductivity in U2PtxRh1-xC2},
author = {Wakeham, N. and Ni, Ni and Bauer, E. D. and Thompson, J. D. and Tegtmeier, E. and Ronning, F.},
abstractNote = {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.},
doi = {10.1103/PhysRevB.91.024408},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 2,
volume = 91,
place = {United States},
year = {2015},
month = {1}
}

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Cited by: 6 works
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