Incommensurate-commensurate antiferromagnetic orders in Kondo lattice compound CeRhAlSi

Sakai, Hironori; Hattori, Taisuke; Tokunaga, Yo; Kambe, Shinsaku; Ghimire, N. J.*; Ronning, F.*; Bauer, E. D.*; Thompson, J. D.*

no journal, , 

Antiferromagnetic Kondo lattice system CeRhAlSi exhibits successive antiferromagnetic transitions at =14 K and =9 K under zero field. Neutron diffraction experiments reveal the commensurate antiferromagnetism below and incommensurate SDW state below above . In this study, we have performed Al NMR measurements using the single crystal of CeRhAlSi. In the paramagnetic state, from the NMR spectral analyses, Knight shifts and electric field gradient on the Al sites have been determined, as well as the anisotropy of hyperfine coupling constants. Based on the nuclear spin -lattice relaxation rates, the Kondo energy scale is found to be close to the energy scale of RKKY interaction, which is consistent with the result by specific heat measurement.