The effect of Ba doping on Sr site on structural and superconducting properties of Bi2212 phase

In this research, we investigate the effect of Ba substitution on Sr sites in the Bi-2212 system. X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray spectrometry (EDS), Raman spectroscopy and AC susceptibility measurements give structural and magnetic properties of the prepared samples. The results reveal the following. X-ray diffraction shows that the Bi-2212 phase is dominant and that the secondary Bi-2201 phase decreases as Ba content increases. Ba doping decreases the cell parameter of the samples. SEM reveals a structure of well-connected grains with a shape of plate. Raman spectroscopy shows the modes of vibration that are present in the superconducting material Bi2Sr(2-x)BaxCaCu2O8+δ. AC susceptibility shows that Ba substitution decreases the critical temperature (Tc). •Ba replacing Sr in Bi2Sr2CaCu2Oδ+8 with lower radius increase Jahn Teller deformation.•Doping with Ba apparent lowring of grains size and texture.•Ba reduce Tc indicating better connectivity between the grains.