Abstract
We report a new hard magnetic phase in the Mn65Ga35−xAlx system. A Mn65Ga35 sample consisting of the D022-type Mn3Ga phase exhibited a coercivity of 400kA/m. The partial replacement of Ga with Al in the Mn65Ga35 sample resulted in the formation of a new cubic phase with a Curie temperature of 680K. This cubic phase exhibited a coercivity of 730kA/m, which is higher than that of the D022-type Mn3Ga phase.
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