Current transport mechanism and control of the ν-value for ag/bi2212 wires and tapes

Satoshi Awaji, Takushi Inoue, Ken Ichiro Takahashi, Petre Badica, Gen Nishijima, Kazuo Watanabe

研究成果: Article査読

1 被引用数 (Scopus)

抄録

In order to study the mechanism of the small n-value for Bi2212, E - J characteristics were measured carefully for various kinds of Bi2212 tapes and round wires in high magnetic fields. Some of wires were heat-treated in a magnetic field of 5 T. We found that the ν-values of all the samples increase by the in-field heat-treatment at 5 T. In addition, we analyzed the E - J properties by the combination of the percolation model based on the local J c distribution and the two directional Jc distribution model. The improvement of the ν-value by the in-field heat treatment can be understood by the change of the aspect-ratio of the grains. Therefore, the aspect-ratio of the grains plays an important role in the current transport influencing not only Jc but also ν-value

本文言語English
論文番号5153165
ページ(範囲)3071-3075
ページ数5
ジャーナルIEEE Transactions on Applied Superconductivity
19
3
DOI
出版ステータスPublished - 2009 6

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学

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