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

Fingerprint

conductors
Annealing
annealing
Synchrotron radiation
synchrotron radiation
Volume fraction
Doping (additives)

All Science Journal Classification (ASJC) codes

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

Cite this

Improvement of J c for GdBCO coated conductors by annealing under strain . / Suzuki, Takumi; Awaji, Satoshi; Oguro, Hidetoshi; Watanabe, Kazuo; Sugano, Michinaka; MacHiya, Shutaro; Sato, Masugu; Izumi, Teruo; Shiohara, Yuh.

In: IEEE Transactions on Applied Superconductivity, Vol. 23, No. 3, 6359783, 01.01.2013.

Research output: Contribution to journalArticle

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, vol. 23, no. 3, 6359783. https://doi.org/10.1109/TASC.2012.2229376
Suzuki, Takumi ; Awaji, Satoshi ; Oguro, Hidetoshi ; Watanabe, Kazuo ; Sugano, Michinaka ; MacHiya, Shutaro ; Sato, Masugu ; Izumi, Teruo ; Shiohara, Yuh. / Improvement of J c for GdBCO coated conductors by annealing under strain In: IEEE Transactions on Applied Superconductivity. 2013 ; Vol. 23, No. 3.
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