Optimal and overdoped superconducting regimes in Hg-2212 system by Pb substitution

  • Toulemonde P
  • Odier P
  • Bordet P
 et al. 
  • 2


    Mendeley users who have this article in their library.
  • 3


    Citations of this article.


Lead substitutions on Hg site and Ca substitutions on Y site have been studied in the Hg-2212 compound in order to reach its optimal doping composition. The unit cell evolution has been studied by powder X-ray diffraction and the structure refined from X-ray synchrotron powder diffraction data. The Pb4+substitution stabilizes the Hg2O2-δlayer allowing full Ca substitution on the Y site. The Ca doping makes the Ba-O2 plane to move away from the Hg-O3 plane, it also reduces the buckling which remains still high (9.7°). The superconducting transitions correspond to optimally and overdoped samples. The Tcmax(82-84 K) is found identical as in (Hg,Tl)-2212 samples suggesting this value to be intrinsic at optimal doping. © 2002 Elsevier Science B.V. All rights reserved.

Author-supplied keywords

  • Crystal structure
  • High-pressure high-temperature synthesis
  • Mercury-based high-Tcsuperconductor
  • Synchrotron X-ray powder diffraction

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • P. Toulemonde

  • P. Odier

  • P. Bordet

  • R. Bruyère

  • J. L. Tholence

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free