Heavy fermion behaviors in LiV2O4

Experiments of various types on the metallic transition metal oxide compound LiV2O4 With the FCC normal-spinel structure are reviewed. The low-temperature T less than or similar to 10 R data consistently indicate heavy fermion (HF) behaviors characteristic of those of the heaviest-mass f-electron HF compounds. A crossover is observed above similar to 50 K in the magnetic susceptibility, Li-7 spin-lattice relaxation rate and neutron magnetic scattering function to a magnetic state variously described as an antiferromagnetically coupled local-moment metal or, at the opposite extreme, as an itinerant nearly ferromagnetic metal. Recent theoretical investigations to understand these properties of LiV2O4 are discussed. (C) 2000 Elsevier Science B.V. All rights reserved.