Control of Y2O3 nano-islands density to introduce artificial pinning centers in YBCO thin films

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

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

We successfully introduced high-density linear defects as artificial pinning centers (APCs) of the quantized vortices into YBCO films, during the film deposition procedure. APCs were introduced perpendicular to the film surface by using the distributed nano-sized Y2O3 islands prepared on SrTiO3(100) substrates. It is possible to induce strong changes on the shape and density of the Y2O3 islands by varying the deposition and annealing conditions. The highest Y2O 3 islands density, 226/μm2, was obtained with fifteen laser pulses at 800°C of substrate temperature, and applying an annealing temperature of 800°C. Even if only a small fraction of the induced defects act as effective pinning centers, Jc of YBCO film grown on the Y 2O3 nanoislands/SrTiO3 substrate increased to 1.8 × 107 A/cm2 (20 K, B//c, 0 T), which is 1.5 times higher than that of the pure YBCO film.

本文言語英語
ホスト出版物のタイトルRecent Advances in Superconductivity: Materials Synthesis, Multiscale Characterization, and Functionally Layered Composite Conductors
ページ109-114
ページ数6
868
出版ステータス出版済み - 2005
外部発表はい
イベント2005 MRS Spring Meeting - San Francisco, CA, 米国
継続期間: 3 28 20054 1 2005

その他

その他2005 MRS Spring Meeting
国/地域米国
CitySan Francisco, CA
Period3/28/054/1/05

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料

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