Stable barium compounds in YBa2Cu3Oy superconductors

R. Kita, K. Suzuki, T. Takeuchi, T. Iwasa, O. Miura, Y. Ichino, T. Yoshimura, Y. Yoshida, K. Yamada, K. Kaneko, A. Ichinose

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    The stability of various amounts of Ba3Cu3In 4O12 (334) or BaTbO3 (BTO) in a sintered YBa2Cu3Oy (YBCO) matrix was examined. Samples with added 334 or BTO exhibited critical temperatures (Tc) above 90 K for up to 20 vol.% addition and improved critical current densities (J c) under a magnetic field. X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray (EDX) analysis indicated that 334 and BTO did not react with the YBCO matrix under the sintering conditions used. The normalized Jc under a magnetic field of 1 T reached a maximum at 14 vol.% of 334 addition and 20 vol.% BTO addition. YBCO thin films with added BTO showed a gradual decrease in the Tc with increasing BTO content. YBCO films with added 334 showed a constant Tc of 87 K up to a 334 content of 4 vol.%.

    Original languageEnglish
    Pages (from-to)859-862
    Number of pages4
    JournalPhysica C: Superconductivity and its applications
    Volume471
    Issue number21-22
    DOIs
    Publication statusPublished - Nov 2011

    All Science Journal Classification (ASJC) codes

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

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