Superconductivity, structure and resistivity in HgBa2Ca2Cu3O8+δ

Z. J. Huang, R. L. Meng, X. D. Qiu, Y. Y. Sun, J. Kulik, Y. Y. Xue, C. W. Chu

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Samples of HgBa2Ca2Cu3O8+δ were successfully prepared and investigated. By examining the X-ray diffraction, transmission electron microscopy, magnetization and resistivity, we found that HgBa2Ca2Cu3O8+δ possesses an orthorhombic structure with lattice parameters a=5.451 (2)Å, b=5.432 (2)Å and c=15.826 (7) Å and a sharp superconducting transition (magnetically determined) at ∼112 K as-synthesized and as high as ∼135 K after oxygenation. The resistivity vanishes below 134 K, the highest reported for any superconductor to date. No superstructures of the types previously reported in the > 130 K samples were detected in this study. A linear T-dependent resistivity which is interpolated to zero at 0 K was also observed above ∼240 K. Below ∼240 K, deviation from such a linearity appears, which may be attributable to the fluctuation or spin-scattering effect, assuming that the behavior is intrinsic to HgBa2Ca2Cu3O8+δ.

Original languageEnglish
Pages (from-to)1-5
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


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