Magnetic Transition of the Mn₂Sb-Mn₂As System

Abstract

The system Mn 2 Sb (1- x ) As ( x ) (0≦ x ≦1) is found to be solid solutions of the Cu 2 Sb type by X-ray analysis. A magnetic phase diagram has been produced by magnetic measurments in the temperature range 80 to 1100 K. Transition from antiferromagnetic to ferrimagnetic states with increasing temperature was observed for the compounds with x ≦0.4 and the compounds with x ≧0.55 were antiferromagnetic at all temperatures below the Néel temperatures. It is shown that these magnetic transition are explained qualitatively by the molecular field theory.