Again combined with the optimization of the rare earth composition in A side, a kind of MmNi 3.55 Co 0.75 Mn 0.4 Al 0.3 B x alloy (Mm: mischmetal) with excellent rate characteristics has been developed.

• 进一步结合A侧稀土成分优化；发展出一类具有优异倍率性能的MmNi3.；55Co0