The Ising-Kondo model describes conduction electrons in a one-dimensional network, interacting with localized spins S=1/2. Here, only the z-component of the interaction between the conduction electrons and the localized spins is considered. The diagram of coupling constant versus the con-duction electron density was calculated by using a density matrix renormalization group. The ground state can be paramagnetic or ferromagnetic depending on the value of the coupling. The critical coupling of the Ising-Kondo model is greater than the Kondo model due to the anisotropy
Keywords: Kondo, DMRG, ferromagnetism