Structure evolution in superconducting (Hg0.7,Tl0.3)2Ba2(Ca x,Y1-x)Cu2O8-2δ

X. J. Wu, A. Tokiwa-Yamamoto, T. Tatsuki, S. Adachi, K. Tanabe

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Nearly single-phase superconducting (Hg0.7,Tl0.3)2Ba2(Ca x,Y1-x)Cu2O8-2δ samples (x = 0.1, 0.2, 0.4 and 0.6) were prepared by a high pressure synthesis technique. The crystal structure of these samples was determined by X-ray Rietveld refinement. This crystal belongs to a tetragonal system and has a space group of I4/mmm with a ≈ 3.86 and c ≈ 29.0 Å. The unit cell parameter a decreases and c increases with increasing x. The expansion of the c-axis is found to mainly result from the increase in the inter-planar distance between the Ba-Hg planes. The present refinement does not show evidence for the substitution of Cu in the (Hg,Tl) site.

Original languageEnglish
Pages (from-to)198-204
Number of pages7
JournalPhysica C: Superconductivity and its applications
Volume273
Issue number3-4
DOIs
Publication statusPublished - 1997 Jan 1

Keywords

  • (Hg,Tl)-2212 phase
  • HRTEM image
  • Structure evolution
  • X-ray Rietveld refinement

ASJC Scopus subject areas

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

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