Abstract
Fine particles of MnBi were prepared by the hydrogen plasma metal reaction method and their magnetic properties were investigated. The particle size of the as-prepared MnBi particles was 70950 nm with a median diameter of 269 nm. Heat treatment and ball milling with a dispersant improved the magnetic properties of the particles. The sample annealed at 330°C for 5 h in Ar then ball-milled for 10min with a dispersant showed the largest energy product of 105 kJ·m13 and a saturation magnetization of 71.0Am2·kg11. High coercivity of 1380 kA·m11 was also obtained for the sample that was ball-milled for 2 h. [doi:10.2320/matertrans.MAW201306]
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