We have investigated phase stabilities and magnetic properties of the tetragonal D022 phase in Mn-deficient Mn3-xGa and Ge-substituted Mn3Ga1-yGey. A transition from the D022 to L10 phase is observed in the composition range of x=0.5-0.8 in Mn3-xGa. On the other hand, the D022 phase is confirmed in the overall composition of Mn3Ga1-yGey. The thermal stability of the D022 phase strongly depends on the Ge content compared with the Mn deficiency. Magnetization of Mn3-xGa is increased by introducing the Mn deficiency, whereas that of Mn3Ga1-yGey decreases with increasing Ge content despite a constant number of Mn atoms. This result suggests that the magnitude of magnetic moment of Mn atom in Mn3Ga1-yGey is influenced by variations of valence electron and structural properties caused by the Ge substitution.
- Magnetic anisotropy
- manganese alloy
- phase stability
- tetragonal structure
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering