Critical current criterion in high-tcsuperconducting films

Kazuo Watanabe, Norio Kobayashi, Hisanori Yamane, Hideyuki Kurosawa, Toshio Hirai, Hisashi Kawabe, Yoshio Muto

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20 Citations (Scopus)

Abstract

Critical current densities at 77.3 K obtained by a voltage criterion of 2 µV/cm were 5.6×105A/cm2at 0 T and 3.1×104A/cm2at 27 T for the best Y1Ba2Cu3O7-δfilm prepared by chemical vapor deposition. Current-voltage curves were fitted by a power law of the form V∝Inwith small n-values of 4–14. Since its n-value is 7 at 27 T, the Jccorresponds to 2.8×104A/cm2in the 1 µV/cm criterion and also to 2.0×104A/cm2in the 0.1 µV/cm one. In the critical current measurement for superconducting oxides, the n-value together with the criterion should always be described.

Original languageEnglish
Pages (from-to)L1417-L1420
JournalJapanese journal of applied physics
Volume28
Issue number8 A
DOIs
Publication statusPublished - 1989 Aug 1

Keywords

  • Criterion
  • Critical current
  • Superconductingoxides

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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