Magnetic Properties of fcc γ-Phase in the Ternary Co–Mn–Fe System

抄録

We have determined the crystallographic as well as the magnetic phase diagrams of the fcc γ-phase in the ternary Co–Mn–Fe system. In the ferromagnetic region, the appearance of the ferromagnetic moment was obtained in terms of e⁄a-value and conditions of the occurrence of Invar effect were pointed out. While, in the antiferromagnetic region, the characteristic temperature dependence of the magnetic susceptibility was observed, a gap-type antiferromagnetism in the (CoMn)_1−xFe_x was found by resistivity measurements and some relations to the antiferromagnetic properties of γ-Fe were shown. The obtained results were discussed from the band-theoretical stand point and the magnetic interaction in this system was mentioned.