Document Type : Research Paper
Authors
Tikrit University/College of Education
Abstract
We have prepared samples of high temperature superconductors namely Bi2-xTlx Ba2Ca2Cu3O10+δ using solid state reaction. The samples have been characterized using x-ray diffraction (XRD), and resistivity measurements using the electrical resistivety measurement. The x-ray data of all superconductor samples showed a tetragonal structure with a high ratio of Bi-2223 superconducting phase.The substitution of Tl by Bi increases the grain size of the superconducting phase and the density of the pellets. Also give a best value of Tc 139 K respectively .
Keywords
Main Subjects
- Z.M. Galasiewiez “Superconductivity and Quantum Fluid”, Pergoman Press, Warszawa, (1970).
- Hat Field. W.E. and Miller, J.H., Jr. “High Temperature Super Conductor Materials” Marcel Dekker, Inc., 37, (1988).
- W. Meissner and R. Ochsenfled. Naturswisschaften, V.12, p.787, (1933).
- Ginzburg, D.M. and Landau L.D., A macroscopic Quantum
- Theory of Super Conductivity (1950).
- London, F. Super Fluid Vo1.111, Page 152 (1950).
- J.G. Bednorz and K.A> Muller, Z, phys 64 (1986)189.
- Chu, C.W.,”science new”Vo1.148. Issue 12 page, 183,(1995).
- Yuan, Y, J. Jiag, X.Y. Gai. Applied Physics Letters Vol. 84(12) PP. 2127-2129 March 22 (2004).
- 10. Ali A.D., Ph.D. Thesis,”superconductivity”، University of Mosul,college of Education (2007).
11. E. Kh. Al-Shakarchi, "The Variation of the structure and phase Transformation in Y- Ba-Cu-O High Temperature Superconductor Compound with Isovalent Substitution "ph.D Thesis, Unversity of Baghdad, College of science,(1997).
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