Journal of Superconductivity

, Volume 8, Issue 4, pp 511–514 | Cite as

Superconductivity above 100 K in compounds containing Hg

  • M. S. Osofsky
  • W. L. Lechter
  • L. E. Toth
  • E. F. Skelton
  • A. R. Drews
  • C. C. Kim
  • B. Das
  • S. B. Qadri
  • A. W. Webb
  • R. J. SoulenJr.
Article

Abstract

The results of studies of new Hg based cuprate superconductors are reported. Several members of a new family of (Hg,Tl)(Ba,Sr)Can−2CunOx high temperature superconductors have been synthesized. These compounds, which are analogs to the Hg-Ba-Ca- and Tl-Ba-Ca-layered cuprates, are multi-phased and have superconducting transition temperatures above 100 K. Incorporation of Hg appears to stabilize several of the Tl-compounds, including a double layer. Tl/Sr system, in a manner similar to the role that Pb plays in the Tl/Sr- and Bi/Sr-systems. It has been suggested that recent reports of resistive Tc's above 200 K in Hg based samples are due to the presence of free Hg. Magnetization measurements of such a sample confirm this hypothesis.

Key words

superconductivity cuprate Hg Tl 
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Copyright information

© Plenum Publishing Corporation 1995

Authors and Affiliations

  • M. S. Osofsky
    • 1
  • W. L. Lechter
    • 1
  • L. E. Toth
    • 1
  • E. F. Skelton
    • 1
  • A. R. Drews
    • 1
  • C. C. Kim
    • 1
  • B. Das
    • 1
  • S. B. Qadri
    • 1
  • A. W. Webb
    • 1
  • R. J. SoulenJr.
    • 1
  1. 1.Naval Research LaboratoryWashington D. C.

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