Improvement of J c for GdBCO coated conductors by annealing under strain

Takumi Suzuki, Satoshi Awaji, Hidetoshi Oguro, Kazuo Watanabe, Michinaka Sugano, Shutaro MacHiya, Masugu Sato, Teruo Izumi, Yuh Shiohara

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

GdBa 2 Cu 3 O y coated conductors were annealed under external strain (strain-annealing). The residual strain after annealing was evaluated using synchrotron radiation. We found that the residual strain is changed by the strain-annealing. The volume fraction of the a-axis domains along the longitudinal direction is increased by compression-annealing and decreased by tension-annealing. In addition, the J c value of the tension-annealed sample increases drastically below 70 K, although the J c value is smaller than that of the as-received sample at 77.3 K for B. The peak of the angular dependent J c at θ = 0°, which originates from the c-axis correlated pinning, for the strain-annealed sample is much smaller than that of the as-received sample. It is considered that the shrinking of the c-axis correlated pinning because of the reduction of the twin structure and the increase of carrier doping may be related to the change in J c properties.

Original languageEnglish
Article number6359783
JournalIEEE Transactions on Applied Superconductivity
Volume23
Issue number3
DOIs
Publication statusPublished - Jan 1 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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    Suzuki, T., Awaji, S., Oguro, H., Watanabe, K., Sugano, M., MacHiya, S., Sato, M., Izumi, T., & Shiohara, Y. (2013). Improvement of J c for GdBCO coated conductors by annealing under strain IEEE Transactions on Applied Superconductivity, 23(3), [6359783]. https://doi.org/10.1109/TASC.2012.2229376