Critical current density and its hysteresis in magnetic field for Ba-Y-Cu-O films prepared by a sputtering technique

Hiroaki Morita, Kazuo Watanabe, Yoshitake Murakami, Yosuke Koyanagi, Koshichi Noto, Hiroyasu Fujimori, Yoshio Muto

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13 Citations (Scopus)

Abstract

A considerably large transport critical current density Jc (1.2ȕ105 A/cm2 at 4.2 K and 15 T) was observed for the superconducting Ba-Y-Cu-O thin films prepared by an rf sputtering method. In association with such a large Jc, the hysteresisof Jc against the applied magnetic field was smaller compared to that in bulk samples prepared by a solid phase reaction method. It was considered that a fairly smooth morphology of grainboundaries in the thin films improved superconducting properties. The hysteresis of Jcwas discussed on the basis of the weak link model.

Original languageEnglish
Pages (from-to)L628-L630
JournalJapanese journal of applied physics
Volume28
Issue number4 A
DOIs
Publication statusPublished - 1989 Apr

Keywords

  • Ba-Y-Cu-O, transport critical current density
  • Film
  • Hysteresis
  • Oxide superconductor
  • Rf sputtering

ASJC Scopus subject areas

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

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