Transition from the Kondo regime to long-range magnetic order in the FexV1-xS system

A study is reported on the electrical and magnetic characteristics of the F exV1 - xS solid-solution system with x less than or equal to 0.5. A maximum in the temperature dependence of resistivity rho(T) characteristic of the Kondo effect has been observed for small x (x < 0.01). For x > 0.1, long-ra nge magnetic order sets in in the system with T-K similar to 100 K. Near x = 0.05, the Fe2+ impurity behavior crosses over to a magnetically ordered p hase. The electronic properties of FexV1 - xS are typical of those of stron gly correlated electronic systems. Both the electrical and magnetic data im ply that carrier delocalization is the strongest at x = 0.4. (C) 2000 MAIK "Nauka/Interperiodica".