Critical current property in YBCO coated conductor fabricated by improved TFA-MOD process

M. Inoue, T. Kiss, K. Motoyama, S. Awaji, K. Watanabe, M. Yoshizumi, Y. Yamada, T. Izumi, Y. Shiohara

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Abstract

We have investigated critical current property in YBa2Cu3O7-δ (YBCO) coated conductor fabricated by improved metal organic deposition using trifluoroacetates (TFA-MOD) process optimizing conditions such as solution compositions. The electric field vs. current density (E-J) characteristic measurement was carried out at wide range of temperature, T, and magnetic field, B. Critical current density, Jc, reached 3.8 × 1010 A/m2 at 77 K in self-field for 1.2 μm thick YBCO layer. In-field Jc is also improved by this new process. From the analysis of E-J characteristics, we have found out that the shape of statistical distribution of Jc in the new process becomes sharper than that of the previous one. These results indicate that the uniformity of YBCO layer is improved by the new process. Furthermore, analytical expression of E-J characteristics, which is based on a percolation model and a scaling law of the pinning force density, shows good agreement with the experimental results. This allows us to predict the critical current property at arbitrary conditions of T and B even if we couldnot have measured data. For example, it is predicted that Jc could be about 1 × 1010 A/m2 at 4.2 K and 30 T parallel to the c-axis.

Original languageEnglish
Pages (from-to)1443-1445
Number of pages3
JournalPhysica C: Superconductivity and its applications
Volume469
Issue number15-20
DOIs
Publication statusPublished - Oct 15 2009

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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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