[en] In this work, Sm and Sc co-doped Bi_1_−_xSm_xFe_1_−_ySc_yO_3 (x  =  0.00–0.20; y  =  0.03) ceramics are fabricated by a rapid liquid phase sintering method, in order to develop single-phase multiferroics with large magnetization and polarization. X-ray diffraction and Raman spectroscopic studies reveal that the ceramics are single-phase with a structural transition from rhombohedral to orthorhombic structures near x  = 0.15. Electric and magnetic measurement results indicate that the transition significantly enhances the multiferroic properties, which stems from the Sm/Sc doping induced collapse of space-modulated spin structure and internal structural distortion. At an optimized composition of Bi_0_._8_5Sm_0_._1_5Fe_0_._9_7Sc_0_._0_3O_3 (x  =  0.15), a remanent polarization of 16.5 μC cm"−"2, a magnetization 0.2020 emu g"−"1, and a magnetodielectric effect of 0.46% can be obtained. These results clearly demonstrate a potential application for Sm/Sc doped BiFeO_3 ceramics in the field of multiferroic devices. (paper)