Jc enhancement in YEa2Cu3Ox thin films by introduction of one-dimensional artificial pinning centers

K. Matsuraoto, T. Horide, P. Mele, A. Ichinose, S. Horii, Y. Yoshida, M. Mukaida, K. Osamura

研究成果: Article査読

9 被引用数 (Scopus)

抄録

A novel technology to introduce artificial pinning centers (APCs) into YBa2Cu3O7-δ (YBCO) thin films prepared by pulsed laser deposition (PLD) was investigated for a drastic improvement of Jc in the films. Linear-like defects (one-dimensional APCs) were introduced perpendicular to the surface of the c-axis oriented films during the deposition process by using distributed Y2O3 nano-islands on substrates. The density of nano-islands was varied within 0.8 - 1.2 × 1010/cm2 by PLD. A normalized resistivity as a function of temperature in magnetic fields shows a sharper resistivity drop for the film with APC, compared to pure YBCO film. Jc of the film with APC was also increased to 0.12 MA/cm2 (77 K, B//c, 5 T), which was about two times higher than that of the pure YBCO film. The film had a very large J c peak when the field was applied close to the c-axis. The peak Jc increased with the number density of Y2O3 nano-islands. This indicates that strong APCs parallel to the c-axis were incorporated into the YBCO film.

本文言語English
ページ(範囲)3774-3777
ページ数4
ジャーナルIEEE Transactions on Applied Superconductivity
15
2 PART III
DOI
出版ステータスPublished - 2005 6月
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学

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