Anisotropy of Spin Fluctuations in a Tetragonal Heavy Fermion Antiferromagnet CeRhAl4Si2

International Workshop on Itinerant-Electron Magnetism

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

Advanced Science Research Center, Japan Atomic Energy Agency, Ibaraki, Tokai

319-1195, Japan^1

Condensed Matter and Magnet Science, Los Alamos National Laboratory, Los Alamos

NM

87545, United States^2

Materials Science Division, Argonne National Laboratory, Argonne

IL

60439, United States^3

关键词: Antiferromagnetics;    Antiferromagnets;    External fields;    Heavy fermion;    High temperature range;    Kondo lattices;    Magnetic excitations;    Nuclear magnetic resonance techniques;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/868/1/012012/pdf
DOI  :  10.1088/1742-6596/868/1/012012

来源: IOP

【 摘 要 】

An antiferromagnetic (AFM) Kondo lattice compound CeRhAl4Si2, which exhibits successive AFM transitions at TN1=14 K and TN2=9 K in zero external field, has been microscopically investigated by means of27Al 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.