Alternate appearance of localized spin and itinerant electron magnetic states in γMn-Ni alloys as observed from the temperature dependence of the electrical resistivity

Abstract

An alternate appearance of localized spin magnetic states and itinerant electron magnetic states was observed in electrical resistivities of antiferromagnetic γMn-24.9, -23.0 and -21.0 at% Ni alloys at temperatures from 300 K to the Néel points. The lattice vibration with unpaired 3d-electrons and the spin density fluctuation of itinerant 3d-electrons change complementarily with magnetic fields from 0 to 0.23 Wb/m 2 in the localized magnetic state. The complementary change is larger in the localized magnetic state of higher temperatures and of lower 3d-electron density. The cause of the complicated crystallographic structures and magnetic state of the alloys is discussed from the viewpoint of the complementary change and its dependence on temperature and density of 3d-electrons.