Thermopower and resistivity measurements on oxygen-annealed HgBa2CaCu2O6+δ

Y. T. Ren, J. Clayhold, F. Chen, Z. J. Huang, X. D. Qiu, Y. Y. Sun, R. L. Meng, Y. Y. Xue, C. W. Chu

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31 引文 斯高帕斯(Scopus)

摘要

We have measured the thermoelectric power and resistivity of the 120 K superconductor HgBa2CaCu2O6+δ (Hg-1212) as a function of temperature and oxygen annealing. Before annealing the Seebeck coefficient is moderate and positive, suggesting that the as-grown compound is slightly under-doped. After annealing in oxygen at 200°C for 10 h, Tc was enhanced by 5 K. Further annealing increased Tc by an additional 1 K and sharpened the transition. The thermopower shifts downward with increasing doping by oxygen annealing, resembling that of the Bi-based and Tl-based systems. The carrier concentration was estimated from thermopower data and the Tc value as ∼0.13 and ∼0.14 per Cu before and after oxygen annealing, respectively.

原文English
頁(從 - 到)6-10
頁數5
期刊Physica C: Superconductivity and its applications
217
發行號1-2
DOIs
出版狀態Published - 1993 11月 10

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 能源工程與電力技術
  • 電氣與電子工程

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