Superconducting Properties of Te-Substituted (Tl_2-xTe_x) Ba₂CaCu₂O_8-δ

Abstract:

The Tl_2-xTe_xBa₂CaCu₂O_8-δ (Tl-2212) high temperature superconductors with x = 0.0-0.5 have been prepared by the standard solid-state reaction method. The precursor powder were sintered at 900°C for 24 h with several grindings and heating. The powder were then pressed into pellets and heated at 910°C in oxygen flow for 4 min followed by furnace cooling. The electrical resistance versus temperature dependence measurements showed metallic normal state behavior for all samples. Substitution of Te at the Tl-site led to multi-phasic samples. The x = 0.4 sample showed the highestT_{c zero}= 98 K and T_conset= 111K. The Tl-2212 phase increased from 50% for x=0 up to 92% in the x= 0.4 sample.

• Periodical: Solid State Phenomena (Volume 290)
• Pages: 239-244
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.290.239
• Online since: April 2019
• Authors: Syahrul Humaidi*, Eddy Marlianto, S. Marhaposan, Roslan Abd-Shukor
• Keywords: Superconductor, Tl-2212 Phase, Transition Temperature

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