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

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    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.

    Original languageEnglish
    Title of host publicationRecent Advances in Superconductivity
    Subtitle of host publicationMaterials Synthesis, Multiscale Characterization, and Functionally Layered Composite Conductors
    PublisherMaterials Research Society
    Pages109-114
    Number of pages6
    ISBN (Print)1558998225, 9781558998223
    DOIs
    Publication statusPublished - 2005
    Event2005 MRS Spring Meeting - San Francisco, CA, United States
    Duration: Mar 28 2005Apr 1 2005

    Publication series

    NameMaterials Research Society Symposium Proceedings
    Volume868
    ISSN (Print)0272-9172

    Other

    Other2005 MRS Spring Meeting
    Country/TerritoryUnited States
    CitySan Francisco, CA
    Period3/28/054/1/05

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering
    • General Materials Science

    Fingerprint

    Dive into the research topics of 'Control of Y2O3 nano-islands density to introduce artificial pinning centers in YBCO thin films'. Together they form a unique fingerprint.

    Cite this