عنوان المقالة: The partial substitution of copper with nickel oxide on the Structural and electrical properties of HgBa2 Ca2 Cu3xNix O 8+δ superconducting compound
Abstract: The present study the partial substitution of copper with nickel on of HgBa2Ca2
Cu3xNix O8+δ superconducting compound where x=002040608 Samples were prepared by solid
state reaction method with sintering temperature 850C0 for 24h. By using Xray powder
diffraction structural of the samples were studied. The XRD analysis's showed the structures a
polycrystalline with tetragonal diagram with majority 1223 phase and the change of the nickel
concentrations produce a change in lattice parameters of the lattice a b and c axis c/a density of
mass ρm and volume fraction Vphase. Four probe apparatus was using to test the electrical
resistivity to defined the critical temperature at zero resistivity Tc offset Optimum Tc offset
was found from HgBa2Ca2Cu24Ni06O8+δ sample with transition temperature its equal to 137K
لهيب أحمد | Laheeb Ahmed | 5659