Transport critical current density and microstructure in extruded YBa 2Cu3O7-x wires processed by zone melting

  • Donglu Shi
  • , H. Krishnan
  • , J. M. Hong
  • , D. Miller
  • , P. J. McGinn
  • , W. H. Chen
  • , Ming Xu
  • , J. G. Chen
  • , M. M. Fang
  • , U. Welp
  • , M. T. Lanagan
  • , K. C. Goretta
  • , J. T. Dusek
  • , J. J. Picciolo
  • , U. Balachandran

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

YBa2Cu3O7-x compounds were extruded into long wires with the diameter of 1 mm after sintering. The sintered wires were subsequently zone melted to develop a highly textured microstructure. Magnetization experiments at 77 K indicated a Jc value of 1×105 A/cm2 at 1 T. Transport measurements at 77 K showed a greatly enhanced field dependence of the critical current density. Transmission electron microscopy revealed an important grain-boundary feature which eliminated the weak-link behavior. Large amounts of dislocations have also been found in the zone-melted sample which may contribute to flux pinning in the system.

Original languageEnglish (US)
Pages (from-to)228-232
Number of pages5
JournalJournal of Applied Physics
Volume68
Issue number1
DOIs
StatePublished - 1990

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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