通过测量样品的磁化强度-温度曲线、电阻率-温度曲线及磁电阻-温度曲线.研究了 Dy 掺杂(0.00≤x≤0.30)对 La_(0.7-x)Dy_xSr_(0.3)MnO_3 体系磁电性质的影响.实验发现,随 Dy 掺杂量的增加,体系磁结构从长程铁磁有序向自旋团簇玻璃态、反铁磁状态转变；x=0.20、0.30时的低温磁行为发生异常,电行为存在低温电阻率极小值现象.这些奇特现象不仅来源于掺杂引起的晶格效应,也来源于掺杂引起的额外磁性耦合. The effects of Dy doping (0.00≤x≤0.30) on the magnetoelectric properties of La 0.7-x Dy x S r 0.3 MnO 3 system were investigated by measuring the magnetization-temperature curve, resistivity-temperature curve and magnetoresistance-temperature curve of the sample The experimental results show that with the increase of Dy doping, the magnetic structure of the system changes from the long-range ferromagnetic order to the glassy state and the antiferromagnetic state of the spin clusters, and the low temperature magnetic behavior at x = 0.20,0.30 is abnormal, The electrical behavior has a low temperature resistivity minimum phenomenon.These strange phenomena not only from the lattice effect caused by the doping, but also from the additional magnetic coupling caused by doping.