Any of several hard, strong alloys of iron, aluminum, nickel, cobalt and sometimes copper, niobium, or tantalum, used to make strong permanent magnets.

• 铝镍钴合金，磁钢由几种硬的强金属，如铁与铝、镍、钴等合成，有时是铜、铌、钽合成，用来制作超硬度永磁合金