Abstract: The effect of Dy on thermal stability and magnetic properties of Nd\|Fe\|Al based bulk amorphous alloys was investigated by means of X\|ray diffractometry (XRD). Differential scanning calorimetry (DSC) and the vibrating sample magnetometer (VSM). The results indicate that the thermal stability can be improved significantly by the addition of Dy. The remanence for (Nd_1-xDy_x)₆₀Fe₃₀Al₁₀（x=0,0.1,0.2）） alloys decreases with increasing Dy mass fraction, but the coercive force increases. The coercive force for Nd\|Fe\|Al amorphous alloy comes of the large magnetocrystalline anisotropy field originated from its lanthanon.

Key words: Nd₆₀Fe₃₀Al₁₀, hard magnetic property, amorphous alloy