Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1621485 | Journal of Alloys and Compounds | 2010 | 5 Pages |
Abstract
We reported here the effect of melting time (1.5-5 min + 5 s) in air and at 920 °C on the normal and superconducting properties of Bi1.7Pb0.3Sr2CaCu2O8 (Bi (Pb): 2212) system. The results of X-ray diffraction, microhardness, resistivity and Hall effect are presented in details. Furthermore, the superconducting critical temperature Tc, normal resistivity Ï300, residual resistivity Ï0, and resistivity slope corresponding to the linear Ï-T region and width of transition ÎTc are extracted from resistivity data. Moreover, various normal state parameters, such as density of holes, Fermi energy and density of states at the Fermi level are calculated for all samples. These results shows a correlation between the above measured parameters against melting time, and indicate that 3.5 min is the suitable melting time to optimizing Tc at 89 K for Bi (Pb): 2212 superconducting system.
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Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
A. Sedky,