The experimental result of M-H indicates that the coercivity is weak in doped Dy system. It is suggested that the peak of magnetization comes from the rotation of magnetic domains in Dy-O-Dy sublattice.

• 用替代离子的磁性效应对磁结构的变化规律进行了解释；La(Dy)亚晶格的磁畴旋转导致出现磁化强度峰.