Phase equilibria in the Mn-rich portion of Mn–Ga binary system

The phase equilibria in the Mn-rich portion of Mn–Ga binary system were experimentally determined. The topological feature of the determined diagram was found to be similar to that reported by Wachtel and Nier [17] while the η phase with the D019 structure exists in a wider temperature and composition range and the τ phase has a wider solubility range. The complicated composition dependence on magnetization of the Mn-rich alloys reported by Masumoto et al. can successfully be explained with the determined phase diagram.

► Phase equilibria in the Mn-rich portion of Mn–Ga system are precisely examined. ► Its topological feature is basically similar to that reported by Wachtel et al. ► Existence regions of η and τ phases are considerably wider than those of the Wachtel version. ► Complex magnetic properties of Mn3Ga alloy are successfully explained by the present diagram.