NMR study of itinerant heavy electron system Ce(Ru1-xRhx)(2)Si-2

Spin-lattice relaxation times (T-1) of Si-29 in Ce(Ru1-xRhx)(2)Si-2 (x = 0, 0.03 and 0.05) were measured in the temperature range between 0.35 and 60 K, Temperature dependences of T-1 do not obey the Korringa relation, and ar e well described by the effect of spin fluctuations based on the SCR theory . The best-fitted parameters to the observed T-1 an close to the values obt ained by the specific heat and the susceptibility measurements. Si-29 NMR a nd Ru-101 NQR observed below T-N similar to 2 K for S = 0.05 have shown the characteristic line shapes associated with the occurrence of longitudinal incommensurate SDW. (C) 2000 Elsevier Science B.V. All rights reserved.