Spin dynamics in a structurally ordered non-Fermi liquid compound: YbRh_2Si_2
arXiv:cond-mat/0207464 · doi:10.1016/S0921-4526(02)01646-0
Abstract
Muon spin relaxation (muSR) experiments have been carried out at low temperatures in the non-Fermi-liquid heavy-fermion compound YbRh_2Si_2. The longitudinal-field muSR relaxation function is exponential, indicative that the dynamic spin fluctuations are homogeneous. The relaxation rate 1/T_1 varies with applied field as H^{-y}, y = 1.0 \pm 0.1, which implies a scaling law of the form Ï''(Ï) \propto Ï^{-y} f(Ï/T), \lim_{x\to0} f(x) = x for the dynamic spin susceptibility.
5 pages, 2 figures. To be published in proceedings of musr2002 (Physica B)