Synthesis, X-ray data, and Hall effect measurements of Li-doped Tl-Ba-Ca-Cu-O superconductor

✍ Scribed by T. S. Kayed

• Book ID: 102124329
• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 71 KB
• Volume: 38
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.200310118

✦ Synopsis

Abstract

Lithium‐doped Tl‐based superconductor was prepared by adding an amount of 0.3 mol.% to the Tl~1.8~Ba~2~Ca~2.2~Cu~3~O~x~ compound. The usual solid‐state reaction method has been applied under optimum conditions. The x‐ray data of the sample show a tetragonal structure with a high ratio of Tl‐2223 superconducting phase. The sample showed a transition at 125 K and the zero resistance was observed at 117 K. Longitudinal (transport) and transverse (Hall) resistivities were measured at different temperatures under different magnetic fields and the data were interpreted. A positive Hall coefficient was observed at normal state and a sign reversal appears at temperatures lower than the critical temperature. (© 2003 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)