Critical currents of YBa2Cu3Oy thick films prepared by liquid phase epitaxial growth

Manabu Yoshida, Takao Nakamoto, Tasuku Kitamura, Ok Bae Hyun, Izumi Hirabayashi, Shoji Tanaka, Akihiro Tsuzuki, Yoshihiro Sugawara, Yuichi Ikuhara

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    31 Citations (Scopus)

    Abstract

    We have succeeded in preparing c-axis oriented high-Jc YBa 2Cu3Oy films on MgO(100) substrate by the liquid phase epitaxy (LPE) technique. The growth rate was typically about 2 μm/min, which was 10-102 times larger than that by ordinary vapor growth techniques. The film thickness ranged 10-50 μm by choosing the dipping time. The Tc of the best film exceeded 88 K after oxygen annealing, and the transport Jc was 1.1×105 A/cm2 at 77 K and 0 T. In-field Jc's at 77 K and 1.5 T were 2.8×10 4 A/cm2 and 2.0×104 A/cm2 for the B⊥ab plane and B∥ab plane, respectively. In addition, the peak effect of Jc was observed at several tesla for B∥ab plane geometry. Based on the microstructure observed by high resolution transmission electron microscopy, the relevant peak effect is considered to be caused by stacking faults which act as a field induced pinning center.

    Original languageEnglish
    Pages (from-to)1714-1716
    Number of pages3
    JournalApplied Physics Letters
    Volume65
    Issue number13
    DOIs
    Publication statusPublished - 1994 Dec 1

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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    Yoshida, M., Nakamoto, T., Kitamura, T., Hyun, O. B., Hirabayashi, I., Tanaka, S., Tsuzuki, A., Sugawara, Y., & Ikuhara, Y. (1994). Critical currents of YBa2Cu3Oy thick films prepared by liquid phase epitaxial growth. Applied Physics Letters, 65(13), 1714-1716. https://doi.org/10.1063/1.112895