Enhancement of critical current density of YBCO films by introduction of artificial pinning centers due to the distributed nano-scaled Y 2O3 islands on substrates

Kaname Matsumoto, Tomoya Horide, Kozo Osamura, Masashi Mukaida, Yutaka Yoshida, Ataru Ichinose, Shigeru Horii

Research output: Contribution to journalArticle

105 Citations (Scopus)

Abstract

We introduced high-density extended crystalline defects, which result in artificial pinning centers of the quantized vortices, into c-axis oriented YBa2Cu3O7-x (YBCO) films. The crystalline defects created perpendicular to the film surface were derived, during the film deposition process, by the distributed nano-sized Y2O3 islands prepared on SrTiO3 (100) substrates. The Y2O 3 nano-islands were approximately 3 nm in height and 25 nm in diameter and the density was controlled from about 89 to 212 μm-2 by choosing the Y2O3 deposition condition. Jcs of YBCO films grown on SrTiO3 substrates with the extended defects were increased by about 150% higher than those of YBCO films without the defects.

Original languageEnglish
Pages (from-to)1267-1271
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume412-414
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - Oct 1 2004
Externally publishedYes

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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