Magnetotransport in (Ce1-xNdx)Cu-6 Kondo alloys

The results of electrical resistivity rho(T) and magnetoresistivity MR(T, B ) for 1.5 less than or equal to T less than or equal to 580 K and mu(0)H = B less than or equal to 8 T are reported for the (Ce1-xNdx)Cu-6 alloy syste m. For small Nd substitutions in the heavy-fermion CeCu6 parent compound, t he Kondo lattice is characterized through coherence effects in rho(T) at lo w temperatures. The rho(T) data above room temperature are used to resolve the electron-phonon scattering, and it is indicated that the single-ion Kon do interaction dominates both rho(T) and MR(B) for a wide range of intermed iate Ce concentrations. Based on this, the MR(B) data for different isother ms and alloy compositions are analysed according to the Bethe-ansatz descri ption. We also discuss the observed deviations of our data from the precedi ng theoretical description due to the onset of magnetic order in alloys wit h high Nd content, and to phase coherence at low temperatures.