High-current superconducting Tl1Ba2Ca 2Cu3Oy thick films on polycrystalline Ag by spin coating

  • Qing He
  • , D. K. Christen
  • , C. E. Klabunde
  • , J. E. Tkaczyk
  • , K. W. Lay
  • , M. Paranthaman
  • , J. R. Thompson
  • , A. Goyal
  • , A. J. Pedraza
  • , D. M. Kroeger

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Thick films of the high-temperature superconductor Tl1Ba 2Ca2Cu3Oy with high current density Jc have been deposited on polycrystalline Ag substrates by a spin-coating method. The spin-coated precursor films were annealed in a two-zone Tl reaction furnace. Film thicknesses ranged from 10 to 30 μm, leading to good total current capabilities. The films have highly-textured c-orientation as evidenced by rocking curves with FWHM of 4°for the (006) peak. Scanning electron micrographs revealed a dense, plate-like layered structure and almost no reaction between the film and the Ag substrate. Values of Jc (77 K) up to 2.5×104 A/cm2 in zero field and more than 1000 A/cm2 in a 1 tesla field (H∥c axis).

Original languageEnglish
Pages (from-to)294
Number of pages1
JournalApplied Physics Letters
Volume67
DOIs
StatePublished - 1995

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