In this research, nanoparticles Bi_1-x-yBa_yLa_xFeO₃ (BB_yL_xFO (with values
(x = 0.0, 0.05, 0.1) and (y = 0.0, 0.15) synthesized by a sol–gel  method. The structural, microstructural and magnetic properties have been investigated, using X-ray diffraction, Raman scattering, field emission scanning electron microscopy (FE-SEM), FTIR  spectroscopy, and magnetometry measurements at room temperature. The refinement of X-ray diffraction pattern of samples indicates a phase transition from rhombohedral (R_3c) to rhombohedral-tetragonal. In addition, The refinement of X-ray Assigned  lattice parameters and unit cell volume.  Analysis of FT-IR confirmed Perovskite structure of samples_. The FE-SEM analysis show nanoparticle size it decreases with La  concentration. Finally, the hysteresis loop of nanoparticle BB_yL_yFO shows ferromagnetic behavior, that may be attributed to the collapse of spin structure and modifying exchange interactions because of La⁺³  and Ba⁺² co-doping. The remenant  magnetization of  BB_0.15L_0.1FO sample (M_r = 1.166 emu/g) is approximately two and half times greater than that of  BB_0.15L₀FO (M_r = 0.514 emu/g). This enhancement in magnetic properties at room temperature can play an important role for the practical applications.