OF BiFeO 3 BY INCORPORATING Ba AND Nb.Bismuth ferrite (BFO) and Ba-Nb-substituted BFO with compositions Bi 1-x Ba x FeO 3 (x= 0, 0.10, 0.15 y 0.20), BiFe 1-y Nb y O 3 (y= 0, 0.03, 0.06 y 0.09) y Bi 1-x Ba x Fe 1-y Nb y O 3 (x= 0.10 (y= 0, 0.03, 0.06 y 0.09) powders were synthesized using the citrate-gel method.Infrared spectroscopy indicated shifting of Bi/Ba-O and Fe/Nb-O bond vibrations and a structural transition was observed by X-ray diffraction.A Williamson-Hall (W-H) analysis revealed that Ba/Nb dopant reduces the particle size and increases the strain crystalline lattice.Impedance analysis suggests that electrical relaxation process is temperature dependent, for all compositions obtained.Furthermore, electrical conductivity increases with temperature showing a typical negative temperature coefficient of the resistance (NTCR) analogous to a semiconductor.Magnetization v magnetic field curves reveal weak ferromagnetic behaviour within the BiFeO 3 doped with Ba and Nb, and co-doped with Ba-Nb, measured at room temperature.