Magnetism of the Kondo compound CeAuAl

The magnetism of the Kondo lattice compound CeAuAl has been investigated through neutron scattering, magnetoresistance, transport and magnetic measurements. Neutron diffraction at 1.5 K revealed a modulated antiferromagnetic structure. Inelastic neutron scattering spectra showed two well defined crystal-field excitations at 24.2 meV and 45.8 meV. The crystal-field parameters have been estimated from an analysis of the neutron spectra and susceptibility data. An estimate of the Kondo temperature has been made by comparison of the low-temperature negative magnetoresistance with Schlottmann's scaling form for the J = 1/2 Kondo impurity. An analysis of thermoelectric power data has been made on the basis of Fischer's theory, which allows Kondo and crystal-field effects to be taken into account.