Critical current enhancement in PLD YBa2Cu3O7-x films using artificial pinning centers

P. Mele, K. Matsumoto, T. Horide, O. Miura, A. Ichinose, M. Mukaida, Y. Yoshida, S. Horii

研究成果: Article査読

15 被引用数 (Scopus)

抄録

We introduced high-density columnar defects as artificial pinning centers (APCs) for quantized vortices into YBa2Cu3O7-x (YBCO) films during the film deposition procedure. APCs were introduced perpendicular to the film surface using nano-sized Y2O3 islands prepared on SrTiO3(1 0 0) substrates. Varying the deposition parameters and the substrate annealing conditions allowed strong changes in the shape and density of the Y2O3 islands to be induced. Compared to a pure YBCO film, the best performance among the APCs samples was obtained on the Y2O3-deposited substrate with 5 laser pulses, corresponding to a nominal thickness of 0.2 nm. Even when the APC films were prepared using the same deposition conditions, the columnar defects enhanced Jc at 77 K from 1.8 to 2.7 MA/cm2 (self field) and from 0.06 to 0.10 MA/cm2 (H = 5 T, H∥c-axis).

本文言語English
ページ(範囲)648-651
ページ数4
ジャーナルPhysica C: Superconductivity and its applications
445-448
1-2
DOI
出版ステータスPublished - 2006 10月 1
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
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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