Improvement of superconducting properties of SmBa2Cu 3Oy films on MgO substrate by using BaZrO3 buffer layer

Katsuya Hasegawa, Junko Shibata, Teruo Izumi, Yuh Shiohara, Yoshihiro Sugawara, Tsukasa Hirayama, Fumiyasu Oba, Yuichi Ikuhara

    Research output: Contribution to journalConference articlepeer-review

    18 Citations (Scopus)

    Abstract

    Superconducting transport-properties of SmBa2Cu 3Oy (Sm123) films on MgO single crystalline substrates prepared by pulsed laser deposition were investigated. It was found that not only Tc,zero values but also Jc-B properties of the Sm123 films were improved by the BaZrO3 (BZO) buffer layer on MgO substrates. Tc,zero=93.8 K, J c(77K,1T,B∥c)=7.5×105 A/cm2 were obtained for Sm123 films with 0.93 μm thickness. Cross-sectional TEM observations revealed that the Sm123 film grown on the BZO buffer layer has higher crystallinity compared to the Sm123 film without BZO. Thus, improvement of the microstructure for the Sm123 films led to the higher superconducting properties of the Sm123 films. In addition, the effects of the BZO buffer layer on the microstructure and correlation to the superconducting properties of the Sm123 films were explained in view of interfacial energies on the hetero-epitaxial growth.

    Original languageEnglish
    Pages (from-to)835-840
    Number of pages6
    JournalPhysica C: Superconductivity and its applications
    Volume392-396
    Issue numberPART 2
    DOIs
    Publication statusPublished - 2003 Oct 1
    EventProceedings of the 15th International Symposium on Superconduc - Yokohama, Japan
    Duration: 2002 Nov 112002 Nov 13

    Keywords

    • BaZrO
    • Critical current density
    • Critical temperature
    • Interfacial energy
    • SmBaCuO

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Energy Engineering and Power Technology
    • Electrical and Electronic Engineering

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