讨论了掺Sm、pr的MnBi合金薄膜的结构、磁性和磁光性能。实验表明,经过退火处理(375℃~425℃/2~4h),样品形成MnBi晶体结构。掺杂含量x=0.1~0.25,样品具有较大的Kerr角(θ(Kmax)=2.57°),内禀矫顽力_MH_c=1.5~5.6KO_e,剩余磁化强度σ_r=30.0~52.3KO_e,剩磁比r=0.88~9.98。磁光谱表明,随着掺杂含量的增大,MnBi样品Kerr角的极大值向长波方向移动。在变温过程中,样品的矫顽力随温度上升而增大,在薄膜(d<250nm)情况下矫顽力以形核机制为主。 The structure, magnetic and magneto-optical properties of SmBi, Pr doped MnBi alloy films are discussed. Experiments show that after annealing (375 ℃ ~ 425 ℃ / 2 ~ 4h), the sample formed MnBi crystal structure. The doping content x = 0.1 ~ 0.25, the sample has a larger Kerr angle (θ (Kmax) = 2.57 °), intrinsic coercivity _MH_c = 1.5 ~ 5.6KO_e and remanent magnetization σ_r = 30.0 ~ 52.3KO_e. Magnetic ratio r = 0.88 ~ 9.98. The magnetic spectra show that with the increase of doping content, the maximum Kerr angle of MnBi sample moves to the longwave direction. In the process of temperature change, the coercivity of the sample increases with temperature, and the coercive force is dominated by the nucleation mechanism at the film (d <250nm).