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