ABSTRACT

The standard superconducting oxides technique for synthesising superconducting oxides was applied under normal pressure to prepare the Tl₂Ba₂Ca₂Cu₃O_10-δ (Tl-2223) superconductor. It is found the optimal conditions and synthesis methods to achieve the formation and stability of the high phase Tl-2223, as well as the appropriate working ranges for the samples to obtain the best superconductor characteristics. The X-ray diffraction (XRD) analysis demonstrated the formation of the tetragonal phase of Tl-2223. The transition behaviour of sample was studied using high magnetic fields ranging from zero T to 10T. The results demonstrated an estimated critical magnetic field (Hc₂) of about 20T and a long coherence length of approximately 4 nm. The transition temperature of about 122 K and the direct current (DC) susceptibility of the superconductor were calculated. It was noted that with an increase in the applied magnetic field, both the transformation temperature and the DC susceptibility values decreased at T = 0 K. These findings provide important insights into the properties and behaviour of Tl-2223 under different conditions.

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