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Current-density enhancements of the highest-Tc superconductors with GeV protons

  • J. R. Thompson*
  • , L. Krusin-Elbaum
  • , D. K. Christen
  • , K. J. Song
  • , M. Paranthaman
  • , J. L. Ullmann
  • , J. Z. Wu
  • , Z. F. Ren
  • , J. H. Wang
  • , J. E. Tkaczyk
  • , J. A. DeLuca
  • *Corresponding author for this work
  • Oak Ridge National Laboratory
  • University of Tennessee
  • IBM
  • Los Alamos National Laboratory
  • University of Kansas
  • SUNY Buffalo
  • General Electric

Research output: Contribution to journalJournal articlepeer-review

Abstract

In several Tl- and Hg-based high-Tc. superconducting materials, vortex-pinning defects were formed by irradiation with 0.8 GeV protons. The protons cause heavy constituent nuclei (Tl, Hg, Bi, ...) to fission, which generates randomly oriented tracks. These columnar defects lead to significant enhancements in the current-conducting properties. We investigated bulk materials and thin films, irradiated with or without Pb or Au "amplifier foil" overlayers, which increase the number of column-creating fission fragments.

Original languageEnglish
Pages (from-to)536-538
Number of pages3
JournalApplied Physics Letters
Volume71
Issue number4
DOIs
StatePublished - 1997.07.28

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