Table of Contents

A Historical Introduction.- Consequences of Fermi Statistics.- Paramagnetism.- Energy Bands in the Crystal.- Experimental Basis of Ferromagnetism.- Weiss Molecular Field Model.- Heisenberg Model.- Itinerant Electrons at 0 K.- Band Gap Theory of Strong Ferromagnetism.- Magnetism and the Crystal Structure - Covalent Magnetism.- Magnetic Impurities in an Electron Gas.- Itinerant Electrons at T > 0: A Historical Survey.- Hubbard Model.- Landau Theory for the Stoner Model.- Coupling Between Itinerant and Localized Moments.- Origin of the Molecular Field.- Exchange and Correlation in Metals.- Spin Fluctuations.- Single Particle Excitations Versus Spin Waves.- Landau-Ginzburg Model for Spin Fluctuations.- Conclusion and Lookout.