Effect of Sr substitution on irreversibility line, lattice dynamics and formation of Hg,Pb-1223 superconductors

Sergey Lee, N. P. Kiryakov, D. A. Emelyanov, M. S. Kuznetsov, Yu D. Tretyakov, V. V. Petrykin, M. Kakihana, H. Yamauchi, Yi Zhuo, Mun Seog Kim, Sung Ik Lee

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Effect of Sr substitution on irreversible properties and lattice dynamics of Hg,Pb-1223 phases was studied. We found that flux pinning properties in high magnetic fields essentially improved by substitutions of Hg by Pb and Ba by Sr. Consideration of lattice dynamics figured out the role of lead and strontium on phase stability and hole doping of CuO2 layers. Investigation of phase composition and micro structural features of the samples allowed us to suggest a possible mechanism of Hg,Pb-1223 phase formation. The substituted samples possessed an improved chemical stability and allowed their further utilization for materials preparation. As an example, nearly single phase thick film on MgO substrate with the Tc of 120 K was obtained by screen printing method. Despite of the very high intragrain critical current density (jc = 3 × 105 A/cm2, H = 0, 77 K), transport jc was restricted by formation of 'weak links' on the grain boundaries.

Original languageEnglish
Pages (from-to)57-67
Number of pages11
JournalPhysica C: Superconductivity and its applications
Volume305
Issue number1-2
DOIs
Publication statusPublished - 1998 Sep
Externally publishedYes

Keywords

  • Encapsulation technique
  • Hg-1223 phase
  • Hg-based superconductors
  • Irreversibility line
  • Raman spectroscopy
  • Screen printing
  • Spray drying
  • Substitutions
  • Thick films

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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