Fermi Liquid Description for Itinerant-Electron Magnetism

On the basis of the Fermi liquid model the magnetic susceptibility χ( T ) for paramagnetic or ferromagnetic metals carrying ininerant electrons is evaluated as a function of temperature. We use an exact expression for χ( T ) in terms of Landau's Fermi liquid function. By varying the interaction strength we obtain χ( T ) curves which qualitatively represent the experimental data for prototype substances Pd, Y 2 Ni 7 , ZrZn 2 and Ni. The present model explains the concurrence of susceptibility maximum and Curie-Weiss susceptibility in nearly ferromagnetic metals, the appearance of thermally induced ferromagnetism, and precise Curie-Weiss law for relatively weak ferromagnets.