Structure and electrical properties of lanthanum doped Bi2Sr2Ca2-xLaxCu3O10+ d superconductor

Authors : Kareem Ali JASSIM

Pages : 245-251

Doi:10.3906/muh-1201-17

View : 12 | Download : 5

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :In this work we studied the effect of La-doping on phase purity, crystal structure and electrical resistivity of Bi2Sr2Ca2Cu3O10+d superconductor, synthesized by usual solid state reaction method. The X-ray florescence insert ignore into journalissuearticles values(XRF); show the stoichiometry of samples and X-ray diffraction insert ignore into journalissuearticles values(XRD); analysis showed the change of structure from orthorhombic to tetragonal by increasing La doping. It was found that the change of lanthanum concentrations of all our samples produce a change in the oxygen content, the ratio of lattice parameters c/a and mass density rm. Electrical resistivity, using the four-probe technique, was used to find the critical temperature Tc and to put in evidence metallic and semiconducting behavior in normal state.
Keywords : Superconductors, electrical resistivity, critical temperature