Relative effects of Pb and Re doping in Hg-1223 thick films grown on Ag substrates

J. H. Su, P. V.P.S.S. Sastry, J. Schwartz

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The relative effects of Pb and Re doping on microstructure, irreversibility field, and electronic anisotropy of HgBa2Ca2Cu3O8+δ (Hg-1223) thick films grown on Ag substrates prepared by dip-coating were studied. Both Pb- and Re-doped films exhibit the dominant phase of Hg-1223, characterized by a superconducting transition temperature (T c) of 133 K. Both dopants distribute homogeneously in the Hg-1223 grains and promote grain growth. Pb-doped films have larger colony size compared to the Re-doped. The irreversibility fields (H irr) of (Hg,Re)-1223 are significantly higher than those of (Hg,Pb)-1223 at temperatures below 100 K. The logarithmic plots of Hirr versus (1 - T/Tc) show both Pb- and Re-doped have a crossover temperature reflecting a transition from two- to three-dimensional behavior with increasing temperature. Re doping significantly decreases the electronic anisotropy γ, which would enhance flux pinning and consequently improve the critical current density. The differences between Pb and Re dopants in affecting γ are explained in terms of crystal structure.

Original languageEnglish (US)
Pages (from-to)2658-2664
Number of pages7
JournalJournal of Materials Research
Volume19
Issue number9
DOIs
StatePublished - Sep 2004

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Relative effects of Pb and Re doping in Hg-1223 thick films grown on Ag substrates'. Together they form a unique fingerprint.

Cite this