Thermodynamics of intermediate-valence two-band ferromagnets: Magnetic susceptibility and dc resistivity

On the basis of the extended two-band s-f model we have calculated the temperature dependence of the magnetic susceptibility and de resistivity (conductivity). A systematic review of the calculated quantities is presented in the form of 3D plots including different average occupation numbers of electrons per site n=1, 1.5, 2 and 2.5, different relative positions of the 4f (5f) band, and different 4f (5f) bandwidths. The calculated quantities exhibit great similarities to the experimentally measured curves for many intermediate-valence rare-earth and actinide-based materials.