Critical current criterion in high-tcsuperconducting films

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

doi:10.1143/JJAP.28.L1417

Critical current criterion in high-t_csuperconducting films

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

Research output: Contribution to journal › Article › peer-review

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 Y₁Ba₂Cu₃O_7-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 J_ccorresponds 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 language	English
Pages (from-to)	L1417-L1420
Journal	Japanese journal of applied physics
Volume	28
Issue number	8 A
DOIs	https://doi.org/10.1143/JJAP.28.L1417
Publication status	Published - 1989 Aug 1

Keywords

Criterion
Critical current
Superconductingoxides

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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title = "Critical current criterion in high-tcsuperconducting films",

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.",

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T1 - Critical current criterion in high-tcsuperconducting films

AU - Watanabe, Kazuo

AU - Kobayashi, Norio

AU - Yamane, Hisanori

AU - Kurosawa, Hideyuki

AU - Hirai, Toshio

AU - Kawabe, Hisashi

AU - Muto, Yoshio

PY - 1989/8/1

Y1 - 1989/8/1

N2 - 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.

AB - 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.

KW - Criterion

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KW - Superconductingoxides

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