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.

Zusammenfassung
Proceedings of the NATO Advanced Research Workshop on Itinerant Electron Magnetism: Fluctuation Effects & Critical Phenomena, Moscow, Russia, September 15-19, 1997

Inhalt
Spin fluctuations in itinerant frustrated systems.- Neutron scattering and µSR studies of spin fluctuations in frustrated itinerant magnets.- Critical fluctuations and the nature of the Néel transition near the triple point in chromium alloys.- UPd2Al3: An analysis of the inelastic neutron scattering spectra.- Anisotropy of the generalized susceptibility in Mn (38% Ni) alloy in the magnetic phase transition region.- Pseudodipolar interaction and antiferromagnetism of R2CuO4compounds (R= Pr, Nd, Sm and Eu).- Soft-mode spin fluctuations in itinerant electron magnets.- Effects of spin fluctuations in transition metals and alloys.- The temperature dependence of the enhanced paramagnetic susceptibility at finite magnetic field.- First-principles study of itinerant-electron magnets: ground state and thermal properties.- Molecular dynamics approach to complex magnetic structures in itinerant-electron systems.- Spin fluctuation theory versus exact calculations.- Magnetovolume effect and longitudinal spin fluctuations in invar alloys.- High temperature thermal expansion of RMn2intermetallic compounds with heavy rare earth elements.- Magnetoelasticity and isotope effect in ferromagnets.- Spin-flop and metamagnetic transitions in itinerant ferrimagnets.- The phase diagram of the Kondo lattice.- Pressure effect on the magnetic susceptibility of the YbInCu, and GdInCu4compounds.- Atomic volume effect on electronic structure and magnetic properties of UGa3compound.- On the temperature dependence of the electrical resistivity of Er0.55Y0.45CO2.- Electrical resistivity and phase transitions in FeRh based compounds: influence of spin fluctuations.- Resistivity, magnetoresistance and Hall effect in Co(100-x)(CuO)x(10?x?70 wt. %) composites.- Theory of itinerant-electron spin-glassin amorphous Fe.- The formation of the magnetic properties in disordered binary alloys of metal-metalloid type.- Itinerant electrons and superconductivity in exotic layered systems.- The multiband analysis of the electron dispersion at the top of the valence band in undoped cuprates.- Spin-Peierls magnet CuGeO3.- Electron acoustic effects in metallic magnetic multilayers.- Author Index.