Superconducting current density profiles estimated from the flux density distributionin yba2cu30^ thin films

Yuko Yokoyama, Yoshishige Suzuki, Yuichi Hasumi, Haruhiko Obara, Takashi Yosimi, Yasuyo Kita, Shin Kosaka, Sadafumi Yoshida

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13 Citations (Scopus)

Abstract

The flux penetration in superconducting thin films has been observed by means of the magnetooptical Faraday effect in iron garnet films. Bi- and Ga-substituted YIG films were used for the observation of the flux density distribution for thedisk-shaped YBa2Cu3Oxfilms with a radius of 0.5 mm and a thickness of 1800. Critical current densityJcwas estimated from the whole profile of the flux density distribution without using Bean’s model. The estimatedJcis about6 x 106A/cm2at 10 K, and this value is smaller than that estimated using Bean’s model from the remanent magnetizationat the same temperature.

Original languageEnglish
Pages (from-to)L 1864-L 1867
JournalJapanese Journal of Applied Physics
Volume30
Issue number11A
DOIs
Publication statusPublished - 1991 Nov
Externally publishedYes

Keywords

  • Bean's model
  • Critical current density
  • Garnet film
  • Y-Ba-Cu-O

ASJC Scopus subject areas

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

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