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

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

Han, C.Y. ; Yin, B. ; Tang, D.S. ; Lin, W. ; Wu, Y.S.

Тема: Свеpхпpоводимость, в том числе высокотемпеpатуpная

Інший ID: PACS: 74.72.Fg, 74.62.Fj

URI: http://dspace.nbuv.gov.ua/handle/123456789/176536

Посилання: 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.

Підтримка: The authors would like to gratefully acknowledge useful help and discussion with Profs. G.Z. Yang, L. Lin, and Q.S. Yang. We would also like to thank Prof.N.B. Brandt (The Moscow National University) for guidence in technology of high pressure.

Дата: 1998

Завантажень: 297

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

Анотація:

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.

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