Antiferromagnetism and spin glass in a Kondo lattice

Abstract We study here the competition among the spin glass (SG), antiferromagnetism (AF) and the Kondo effect in a model which consists of two Kondo sublattices with both a Kondo coupling JK and a random interaction that couples the localized spins of different sublattices with antiferromagnetic mean J0 and standard deviation J. The obtained phase diagram shows the sequence of phases SG, AF and a Kondo state for increasing Kondo coupling JK in qualitative agreement with the experimental data of Ce2Au1−xCoxSi3 alloys.