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"This volume attempts to fill the gap between standard introductions to solid state physics, and textbooks which give a sophisticated treatment of strongly correlated systems. Starting with the basics of the microscopic theory of magnetism, one proceeds with relatively elementary arguments to such topics of current interest as the Mott transition, heavy fermions, and quantum magnetism. The basic approach is that magnetism is one of the manifestations of electron–electron interaction, and its treatment should be part of a general discussion of electron correlation effects.Though the text is primarily theoretical, a large number of illustrative examples are brought from the experimental literature. There are many problems, with detailed solutions.The book is based on the material of lectures given at the Diploma Course of the International Center for Theoretical Physics, Trieste, and later at the Technical University and the R. Eötvös University of Budapest, Hungary."

Magnetism, Band theory of. --- Electron configuration. --- Electron-electron interactions. --- Metal-insulator transitions. --- Transitions, Metal-insulator --- Anderson model --- Electric insulators and insulation --- Free electron theory of metals --- Phase transformations (Statistical physics) --- Transition metals --- Interactions, Electron-electron --- Electrons --- Lepton interactions --- Configuration, Electron --- Electron correlation --- Atomic orbitals --- Band model of magnetism --- Band theory of magnetism --- Itinerant-electron magnetism --- Energy-band theory of solids --- Magnetism

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This volume shows how collective magnetic excitations determine most of  the magnetic properties of itinerant electron magnets. Previous theories were mainly restricted to the Curie-Weiss law temperature dependence of magnetic susceptibilities. Based on the spin amplitude conservation idea including the zero-point fluctuation amplitude, this book shows that the entire temperature and magnetic field dependence of magnetization curves, even in the ground state, is determined by the effect of spin fluctuations. It also shows that the theoretical consequences are largely in agreement with many experimental observations. The readers will therefore gain a new comprehensive perspective of their unified understanding of itinerant electron magnetism.

Engineering & Applied Sciences --- Applied Mathematics --- Applied Physics --- Physics. --- Medical research. --- Mechanics. --- Observations, Astronomical. --- Astronomy --- Quality of life. --- Astronomy, Observations and Techniques. --- Quality of Life Research. --- Observations. --- Magnetism, Band theory of. --- Fluctuations (Physics) --- Variations (Physics) --- Stochastic processes --- Band model of magnetism --- Band theory of magnetism --- Itinerant-electron magnetism --- Energy-band theory of solids --- Free electron theory of metals --- Magnetism --- Quality of Life --- Classical Mechanics. --- Research. --- Life, Quality of --- Economic history --- Human ecology --- Life --- Social history --- Basic needs --- Human comfort --- Social accounting --- Work-life balance --- Classical mechanics --- Newtonian mechanics --- Physics --- Dynamics --- Quantum theory --- Astronomy—Observations. --- Astronomical observations --- Observations, Astronomical

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A summary of recent developments in theoretical and experimental studies of fluctuation effects in itinerant electron magnets, focusing on novel physical phenomena: soft-mode spin fluctuations and zero-point effects, strong spin anharmonicity, magnetic frustrations in metals, fluctuation effects in Invar alloys and low-dimensional systems. All of these may be important for novel high-technology applications.

Magnetic ions --- Magnetisatie --- Magnetization --- Magnétisation --- Free electron theory of metals --- Congresses --- Condensed matter. --- Statistical physics. --- Dynamical systems. --- Solid state physics. --- Spectroscopy. --- Microscopy. --- Magnetism. --- Magnetic materials. --- Condensed Matter Physics. --- Complex Systems. --- Solid State Physics. --- Spectroscopy and Microscopy. --- Magnetism, Magnetic Materials. --- Statistical Physics and Dynamical Systems. --- Materials --- Mathematical physics --- Physics --- Electricity --- Magnetics --- Analysis, Microscopic --- Light microscopy --- Micrographic analysis --- Microscope and microscopy --- Microscopic analysis --- Optical microscopy --- Optics --- Analysis, Spectrum --- Spectra --- Spectrochemical analysis --- Spectrochemistry --- Spectrometry --- Spectroscopy --- Chemistry, Analytic --- Interferometry --- Radiation --- Wave-motion, Theory of --- Absorption spectra --- Light --- Spectroscope --- Solids --- Dynamical systems --- Kinetics --- Mathematics --- Mechanics, Analytic --- Force and energy --- Mechanics --- Statics --- Mathematical statistics --- Condensed materials --- Condensed media --- Condensed phase --- Materials, Condensed --- Media, Condensed --- Phase, Condensed --- Liquids --- Matter --- Qualitative --- Statistical methods --- Analytical chemistry --- Free electron theory of metals. --- Nuclear magnetism. --- Magnetism, Band theory of --- Band model of magnetism --- Band theory of magnetism --- Itinerant-electron magnetism --- Energy-band theory of solids --- Magnetism --- Nuclear physics --- Metals