Enhancement of in-field current transport properties in GdBCO coated conductors by BaHfO3 doping

Masayoshi Inoue, Yoshimasa Yamaguchi, Takashi Sakakibara, Kazutaka Imamura, Kohei Higashikawa, Takanobu Kiss, Satoshi Awaji, Kazuo Watanabe, Hiroshi Tobita, Masateru Yoshizumi, Teruo Izumi

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

We have investigated the in-field current transport property in BaHfO 3 doped GdBa2Cu3O7-δ coated conductors in a wide range of temperatures and magnetic fields. Significant improvement of in-field critical current Ic was observed, e.g., Ic@77 K,3T = 93A/cm-w, Ic@20 K 17T = 700 A/cm-w, which is a comparable value to that of Nb3Sn wire at 4.2 K. Enhancement of the irreversibility field was also observed. These results suggest that BaHfO 3 is one of the most promising materials as effective artificial pinning centers and leads to the enhancement of in-field Ic. Furthermore, we have also shown that our analytical expression of electric field versus current density characteristics based on the percolation transition model [1-3] agrees well with the experimental results over a wide range of magnetic fields and temperatures. This analytical expression is useful for the design of superconducting devices because this allows us to predict the current carrying capability of coated conductors not only Jc but also n-value at arbitrary operating conditions of temperature and magnetic field.

Original languageEnglish
Article number6461926
JournalIEEE Transactions on Applied Superconductivity
Volume23
Issue number3
DOIs
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

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

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