Both Mn₄C (=Mn₃MnC) and Mn₃GaC have been studied previously. However, the reports on MnSUB3+x/SUBGaSUB1-x/SUBC (0 ≤ x ≤ 1) with intermediate compositions are very rare. In this work, the structure and magnetic properties of MnSUB3+x/SUBGaSUB1-x/SUBC prepared by using solid state reaction were studied systematically. High purity anti-perovskitetype MnSUB3+x/SUBGaSUB1-x/SUBC were obtained in the composition range of 0 ≤ x ≤ 0.5, above which Mn₂₃C₆ precipitates and the fraction of Mn₂₃C₆ in the samples increases with increasing x. The structural stability, lattice parameters, and room temperature saturation magnetization of ferromagnetic MnSUB3+x/SUBGaSUB1-x/SUBC (0 ≤ x ≤ 1) decreases with increasing x. The Curie temperature of MnSUB3+x/SUBGaSUB1-x/SUBC (0 ≤ x ≤ 1) increases with increasing x. Most MnSUB3+x/SUBGaSUB1-x/SUBC with varied x exhibit near-zero coercivity and zero remanent magnetization. This work indicates that the temperature coefficient of magnetization of MnSUB3+x/SUBGaSUB1-x/SUBC may be tuned by tuning the fraction of the Ga atoms.
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Liang et al. (2024) studied this question.
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