Characterization of superconducting (Tl,Bi)Sr2CaCu2Oy

✍ Scribed by P.G. Wahlbeck; D.E. Peterson; J.O. Willis; E.J. Peterson; J.Y. Coulter; D.S. Phillips; K.V. Salazar

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 418 KB
• Volume: 256
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(95)00490-4

✦ Synopsis

The superconducting phase with mixed TI and Bi, namely (Tlo.55Bio.45)Sr2CaCu20y, was synthesized and characterized. Synthesis conditions were studied, and this phase, (TI,Bi)-1212, was found to form preferentially to (TI,Bi)-1223 when Sr was present with no Ba present. X-ray powder diffraction with Rietveld refinement provided structural data. The phase is tetragonal with a = 3.7988(4) A and c = 12.076(1) A, with space group symmetry P4/mmm, and with a platelet crystal morphology. Magnetic-susceptibility data gave an onset of superconductivity T c at 94.9 + 1.3 K with a T c mid of 86.0 + 1.1 K. Magnetic-hysteresis measurements showed that substantial flux pinning occurs in this phase at high temperatures.