TRANSPORT PROPERTIES OF Mn_3−xCo_xGaC (x≤0.12)

Abstract

The electrical resistivity p and the thermoelectric power S of Mn 3–x Co x GaC(x≤0.12) are studied to investigate the mechanism of the magnetic order-order transition. The ρ-T curves for samples with 0<x≤0.06 show the appearence of an intermediate magnetic phase. The experimental results suggest that the magnetic phase transitions of Mn 3−x Co x GaC should be discussed in terms of itinerant electron magnetism.