Crystal structure and superconductivity in (Cu,Hg)Ba2Ca4Cu5Oy

Details Crystal structure and superconductivity in (Cu,Hg)Ba2Ca4Cu5Oy Crystal structure and superconductivity in (Cu,Hg)Ba2Ca4Cu5Oy

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997phyc..281..237a&link_type=abstract

Physica C: Superconductivity, Volume 281, Issue 2-3, p. 237-243.

Physics

Condensed Matter

Superconductivity

8

Elsevier: (Cu, Hg)Ba2Ca4Cu5Oy, Single-Crystal X-Ray Structure Analysis, Cu-Based Superconductor, Hg-Based Superconductor, Solid-Solution System

Scientific paper

A new solid-solution superconductor, (Cu,Hg)Ba2Ca4Cu5Oy with the tetragonal lattice parameters a = 3.849(2) Å and c = 21.496(3) Å, has been synthesized by the high-temperature and high-pressure technique. The structure refinement of the as-prepared (Cu,Hg)-1245 by the single-crystal X-ray diffraction method confirmed the substitutional composition (Cu0.76Hg0.24)Ba2Ca4Cu5O12.45, whose cationic composition was close to that obtained by chemical analysis. The additional Cu atoms at the mercury site construct the chain-like oxygen coordination. The superstructure observed in Cu-1245 disappeared by the partial substitution of mercury for copper in the present (Cu,Hg)-1245. The structure refinement of the as-prepared Hg-1245 revealed the mercury-site deficiency of about 20%.

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