Study the Effect of Partial Substitution of zinc instead of copper on the Structural and Electrical Properties of Superconducting Compound

Abstract

In this research, we prepared the compound (Hg. based on mercury and studied the effect of partial substitution of zinc oxide (ZnO) instead of copper oxide (CuO) at a concentration of x = (0.0, 0.1,0.2 and 0.3) and the samples were prepared by the state reaction method. Solid at sintering temperature (800°C) for 24 hours Then the samples were cooled to room temperature at the same heating rate. To determine the critical temperature, four-probe technique have been used and the test of resistivity as a function temperature show that all specimens have a metallic behavior.   The highest critical temperature we have found (123.8 k), when(x=0.3)   The XRD analyses for all superconductor specimens was found that the crystal structure were tetragonal for all specimens. All the specimens were consist of a major 1223 high - phase, and minor low - phase 1212 and (1201) and very small amounts of secondary phases with lattice parameter a, b, and c.