The non-Fermi-liquid behavior in magnetic Kondo lattices induced by peculiarities of spin dynamics

A scaling consideration of the Kondo lattices is performed with account of singularities in the spin excitation spectral function. It is shown that a non-Fermi-liquid (NFL) behaviour occurs naturally for complicated magnetic structures with several magnon branches. This may explain the fact that a N EL behaviour often takes place in the heavy-fermion systems with peculiar s pin dynamics. The mechanisms proposed lead to some predictions about behavi our of specific heat, resistivity, magnetic susceptibility and anisotropy p arameter, which can be verified experimentally (C) 2000 Published by Elsevi er Science B.V. All rights reserved.