The present study involves co-precipitation method to grow un-doped and Zr-doped bismuth iron oxide with Xzr =0.10-0.30.The molar solutions of ferric chloride (FeCl3),zirconyle chloride (ZrOCl2),and bismuth chloride (BiCl3) are prepared in distilled water,and are allowed to react with sodium hydroxide (NaOH).The synthesized powders are then converted into pellets,which are sintered at 500 ℃ for two hours in a muffle fuace.X-ray diffraction (XRD) shows multi-phase formation in un-doped and Zr doped samples.Scanning electron microscope (SEM) depicts layered structure at low Zr concentration XZr =0.10,while uniform surface with smaller grains and voids is observed at XZr =0.20,but at XZr =0.30,cracks and voids become prominent.The ferromagnetic nature of the un-doped sample is observed by vibrating sample magnetometer (VSM),while paramagnetic behavior appears due to Zr doping.The ferromagnetism in un-doped sample is lost by Zr doping,which is due to the formation of additional Fe O-Zr bonds that induce paramagnetic behavior.