Kayed, Tarek SaidKayed, TSDepartment of Electrical & Electronics Engineering2024-07-052024-07-05200350232-13001521-407910.1002/crat.2003101182-s2.0-0344927826https://doi.org/10.1002/crat.200310118https://hdl.handle.net/20.500.14411/1151Kayed, Tarek/0000-0003-3482-4166Lithium-doped Tl-based superconductor was prepared by adding an amount of 0.3 mol.% to the Tl1.8Ba2Ca2.2Cu3Ox 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. (C) 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.eninfo:eu-repo/semantics/closedAccesshigh temperature superconductorsHall-effectdopingTl-based superconductorsArticleQ33811946950WOS:000186532300004