Effect of partial substitution of lanthanum (La) on the structural and electric properties of Bi2iS2is2Ca2iCu3-xLaxO10+o

In the current study, we investigate the effect of (La) substitution instead of (Cu) on the properties of the superconductor compound (Bi2iS2is2Ca2iCu3-xLasO10+o) with (x=0,0.05.0.1.0.15,0.2). The samples were prepared by solid state reaction method(SSR). X- ray diffraction technique (XRD) was used to estimate the structural properties of the specimens which show an orthorhombic crystalline structure for all the specimens. The results show that the change in ( La) concentration leads to decrease the concentration of (Bi-2223). increment in (Bi-2212 ) and(Bi-2201) with appearance of some impurities. Also decrease the critical temperature(Tc) with the increase of ( La) concentration.