Stability of barium oxides in REBa 2 Cu 3 O y superconductors

R. Kita, S. Kato, T. Nakamura, O. Miura, Ryo Teranishi, S. Yasunaga, H. Kai, Masashi Mukaida, A. Ichinose, K. Matsumoto, M. S. Horii, Y. Yoshida

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)


    We have investigated the stability of BaSnO 3 , BaZrO 3 , BaTiO 3 and BaNb 2 O 6 in the ErBa 2 Cu 3 O y (Er123) matrix by mixing and sintering powders of Er123 and barium oxides. The degradation of T c due to the addition of barium oxide was the lowest in the case of BaSnO 3 (BSO). BSO-added samples exhibited a T c above 90 K even for 15 vol% addition and an improved J c under a magnetic field. XRD and SEM results indicated that BSO was very stable in the Er123 matrix. The dependence of T c on BSO addition showed similar trends for the sintered samples and Er123 thin films. It was found that the most stable barium oxide in Er123 superconductors was BaSnO 3 .

    Original languageEnglish
    Pages (from-to)1391-1394
    Number of pages4
    JournalPhysica C: Superconductivity and its applications
    Issue number15-20
    Publication statusPublished - Sept 15 2008

    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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