Magnetic Properties of MnBi Fine Particles Fabricated Using Hydrogen Plasma Metal Reaction
2013 年 54 巻 9 号 p. 1673-1677
詳細
2013 年 54 巻 9 号 p. 1673-1677
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 70–950 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 10 min with a dispersant showed the largest energy product of 105 kJ·m−3 and a saturation magnetization of 71.0 Am2·kg−1. High coercivity of 1380 kA·m−1 was also obtained for the sample that was ball-milled for 2 h.
