Anisotropy of Spin Fluctuations in a Tetragonal Heavy Fermion Antiferromagnet CeRhAl ₄ Si ₂

Journal Article · 01 June 2017 · Journal of Physics. Conference Series

DOI: https://doi.org/10.1088/1742-6596/868/1/012012 · OSTI ID:1375889

Sakai, H. ^[1]; Hattori, T. ^[1]; Tokunaga, Y. ^[1]; Kambe, S. ^[1]; Ghimire, N. J. ^[2]; Ronning, F. ^[3]; Bauer, E. D. ^[3]; Thompson, J. D. ^[3]

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1. Japan Atomic Energy Agency (JAEA), Tokai (Japan). Advanced Science Research Center
2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

An antiferromagnetic (AFM) Kondo lattice compound CeRhAl₄Si₂, which exhibits successive AFM transitions at T _N1=14 K and T _N2=9 K in zero external field, has been microscopically investigated by means of ²⁷Al nuclear magnetic resonance (NMR) technique. In the high temperature range, magnetic excitations of 4f electrons can be well explained by isotropic localized spin fluctuations. Below ~50 K, it begins to show a characteristic anisotropy of spin fluctuations, which suggests a competition between spin fluctuations and nesting instability in this system.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22)
• Grant/Contract Number: AC52-06NA25396
• OSTI ID: 1375889
• Report Number(s): LA-UR-17-26563
• Journal Information: Journal of Physics. Conference Series, Vol. 868; ISSN 1742-6588
• Publisher: IOP PublishingCopyright Statement
• Country of Publication: United States
• Language: English