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, M. Mukaida, Y. Yoshida, S. Horii

研究成果: Conference 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English
ホスト出版物のタイトルRecent Advances in Superconductivity
ホスト出版物のサブタイトルMaterials Synthesis, Multiscale Characterization, and Functionally Layered Composite Conductors
ページ109-114
ページ数6
出版ステータスPublished - 2005 12 1
外部発表はい
イベント2005 MRS Spring Meeting - San Francisco, CA, United States
継続期間: 2005 3 282005 4 1

出版物シリーズ

名前Materials Research Society Symposium Proceedings
868
ISSN(印刷版)0272-9172

Other

Other2005 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period05/3/2805/4/1

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

フィンガープリント 「Control of Y<sub>2</sub>O<sub>3</sub> nano-islands density to introduce artificial pinning centers in YBCO thin films」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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