Tuning the magnetic anisotropy in ${\mathrm{CeRhIn}}_5$ via Gd substitution

Journal Article · 21 December 2017 · Physical Review B

DOI: https://doi.org/10.1103/PhysRevB.96.220409 · OSTI ID:1481972

Rosa, P. F. S. ^[1]; Faust, L. M. ^[1]; Bauer, E. D. ^[1]; Thompson, J. D. ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

In strongly correlated materials, the presence of defects may fundamentally affect both macroscopic and microscopic properties of the system. Here we investigate the effect of Gd substitution in the Kondo antiferromagnet CeRhIn₅. At a concentration of only 11% Gd, the magnetic anisotropy of CeRhIn₅ is drastically reduced at high temperatures, whereas its antiferromagnetic transition, T^Ce_N = 3.8 K, is linearly suppressed with Gd at low temperatures. Here, the extrapolation of T^Ce_N to zero temperature occurs at a critical concentration of x_c ~ 0.63, which is above the two-dimensional percolation limit found in Ce_1–xLa_xRhIn₅ (x_c ~ 0.4), but very close to the three-dimensional percolation limit found in Gd_1–xLa_xRhIn₅ and Ce_1–xLa_xIn₃ (x_c ~ 0.65), in agreement with the more isotropic magnetic response.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-06NA25396
• OSTI ID: 1481972
• Alternate ID(s): OSTI ID: 1414503
• Report Number(s): LA-UR-17-29039; PRBMDO
• Journal Information: Physical Review B, Vol. 96, Issue 22; ISSN 2469-9950
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English