MAGNETIC INSTABILITY IN CEFE2 - EFFECTS OF RE AND IR SUBSTITUTIONS

We present here the resistivity and magnetization study of Ir and Re s ubstituted C-15 Laves-phase compound CeFep(2). Re and Ir substitution triggers the incipient ferromagnetic instability in CeFe2 resulting in a transition from ferromagnetic to antiferromagnetic state. Both resi stivity and magnetization show clear indications of both paramagnetic- to-ferromagnetic and ferromagnetic-to-antiferromagnetic transitions. T he antiferromagnetic phase is restored to ferromagnetic phase on appli cation of sufficiently strong magnetic field.