Interpretation of the critical current in Bi2Sr2Ca2Cu3Ox tape conductors as parallel weak-link and strong-link paths

D. C. Van Der Laan, H. J.N. Van Eck, J. Schwartz, B. Ten Haken, H. H.J. Ten Kate

Research output: Contribution to journalArticle

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Abstract

To better understand the dominant mechanisms that limit the critical current density in high temperature superconductors, the dependence of the critical current density on magnetic field and temperature of Bi2Sr2Ca2Cu3Ox tapes is measured in magnetic fields up to 8 T and temperatures between 4.2 and 100 K. The results were modeled by describing the current in the tape as two parallel current paths. The critical current density of one path is limited by weak links and that of the other path by intragranular flux pinning. The temperature dependence of the parameters used in the model indicates that the weak link contribution vanishes at a temperature of 86 K. This is an indication that the weak link behavior is dominated by a remnant Bi2Sr2CaCu2Ox phase. At higher temperatures the critical current density of the tape is limited by intragranular pinning.

Original languageEnglish (US)
Pages (from-to)1024-1027
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume372-376
Issue numberPART 2
DOIs
StatePublished - Aug 1 2002

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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