Superconductivity and magnetism in heavy-electron systems

Evidence that intermetallic compounds with uranium as one constituent may also show the physical properties found in Ce compounds whose transition from classical to quantum statistical behavior is shifted to below room temperature is presented. Phase transitions of the Fermi liquid state to superconductivity or magnetic order are observed. Normal and superconducting properties suggest that magneticaly ordered states are probably not due to conventional electron-phonon interaction, and may be characterized as a 1 does not = 0 paired state. Magnetically ordered states are probably spin-density-wave ground states of the heavy electron systems.