Superconductivity above 250K in Tl₁.₈Ba₂.₀Ca₂.₆Cu₃.₀O₁₀+δ high pressure

• Published in: Физика низких температур
• Date: 1998
• Main Authors: Han, C.Y., Yin, B., Tang, D.S., Lin, W., Wu, Y.S.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 1998
• Subjects: Свеpхпpоводимость, в том числе высокотемпеpатуpная
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/176536
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Superconductivity above 250K in Tl₁.₈Ba₂.₀Ca₂.₆Cu₃.₀O₁₀+δ high pressure / C.Y. Han, B. Yin, D.S. Tang, W. Lin, Y.S. Wu // Физика низких температур. — 1998. — Т. 24, № 4. — С. 305-308. — Бібліогр.: 7 назв. — англ.

The pressure dependence of the superconducting transition temperature Tc(onset) of Tl₁.₈Ba₂.₀Ca₂.₆Cu₃.₀O₁₀+δ (Tl-2223) has been measured under quasi-hydrostatic pressure (QHP) up to 5.0 GPa. The Tc increases with increasing pressure at a relatively high rate and reaches a maximum at 255.4 K and pressure of about 4.3 GPa. This is the highest Tc yet observed for any high-Tc superconductor. The total change in Tc from ambient condition (Tc=129K) to the high pressure applied can be greater than 126 K. The Tc above 200 K was replicated several times in our experiments. The site of the maximum of Tcn and the value of dTc/dP=1.7K/GPa (at P = 0) agree with previous results obtained by D. Tristan Jover et al. [1] and J. G. Lin et al. [2], respectively.