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

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)6-10
Number of pages5
JournalPhysica C: Superconductivity and its applications
Issue number1-2
Publication statusPublished - 1993 Nov 10

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


Dive into the research topics of 'Thermopower and resistivity measurements on oxygen-annealed HgBa2CaCu2O6+δ'. Together they form a unique fingerprint.

Cite this