Abstract
The microstructural and magnetic properties of Mn3Ga alloys with D022 phase have been investigated. Mn3Ga alloys with a nearly pure D022 phase were obtained via a heat treatment of ground arc-melted ingot powders with a cubic structure. X-ray difraction results show the formation of D022 after annealing the as-prepared ingot at 673 K for different annealing time intervals. It was found that the annealed samples are magnetically hard with a high HC of 11 kOe and a saturation magnetization of 20 emu g−1 at 300 K. Microstructure studies on the annealed powders showed the presence of small grains with size below 30 nm.
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