Magnetic re-entrance in intermediate valence compounds.

Abstract

We explore the possibility of magnetic re-entrance in intermedíate valence compounds. Using a simplified Anderson—Lattice model we obtain the pressure-temperature magnetic phase diagram. This diagram shows that for some value of the microscopic parameters the temperature induced two transitions (non-magnetic to magnetically ordered to paramagnetic).We calculate the magnetization and the average occupation number of the localized state. Estimations of the observability of the effect in systems like CeAl2 are made.