It is concluded that at the boundary of Brillouin Zone there is a strong broadening in the magnon linewidth and softening, and the influences of the parameters are also illustrated.

• 发现在布里渊区边界区域磁振子谱的软化和磁振子谱线增宽最明显。也讨论了各项参数的变化对磁振子谱的软化与磁振子谱线增宽的影响。