Abstract :
The effect of the Ag partial substitution at Hg site in HgOδ layer on the structure ,Tc and oxygen content for Hg-
1223 have been studied .High temperature superconductor composition Hg1-xAgxBa2Ca2Cu3O8+δ, with x=(0.0, 0.05, 0.1, 0.15, 0.2, 0.25 and 0.3) have been prepared using solid state reaction method. Annealing temperature 850 C0 for (24) hours with a rate of 5C˚/min and under a pressure of 7 ton/cm2. XRD analysis showed a tetragonal polycrystalline structure with high ratio of Hg-1223 phase and increase of c-axis lattice parameter with increase Ag rate. The surface morphology has been studied by using atomic force microscopes (AFM) in 3D. The results showed that all specimens have good crystalline and homogeneous surface. Also give a best Nano size value is 77.52 nm at x=0.3. Four probe technique is used to measured Tc . The highest Tc was found to be Tc=144 K for x=0.3, and oxygen contend was observed increase with increase Ag content.
Author Name : Noor S. Abed, Sabah J. Fathi & Kareem A. Jassim
DOI: https://doi.org/10.5281/zenodo.816582
Keywords: HgBa2Ca2Cu3O8+δ, Superconductor, Solid state reaction metho , Structural Properties.
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