Magnetic Microscopy for Nondestructive Characterization of Local Critical Current Distribution in MgB2 Wires With Magnetic Sheath Materials

Kohei Higashikawa, Hiroshi Tatara, Masayoshi Inoue, Shujun Ye, Akiyoshi Matsumoto, Hiroaki Kumakura, Takanobu Kiss

研究成果: Contribution to journalArticle査読

3 被引用数 (Scopus)

抄録

We have developed a method for the nondestructive characterization of critical current distribution in MgB2 wires based on magnetic microscopy. This method enables us to evaluate critical currents of MgB2 wires, even in the condition where they become too large to be measured by the conventional four-probe transport method from the viewpoint of heat generation and/or the limitation from the measurement system. Furthermore, the inhomogeneity in local critical currents in the wires can be also estimated, while it is difficult for the conventional magnetization method, using a SQUID magnetometer. In this paper, by overcoming the influence of magnetic sheath materials, which are widely used for recent high-performance MgB2 wires, we have succeeded in developing a nondestructive method for the characterization of longitudinal distribution of local critical currents in them. This method will become a fundamental technique for a nondestructive product testing at the stage of full-fledged commercial production in the future.

本文言語英語
論文番号7378317
ジャーナルIEEE Transactions on Applied Superconductivity
26
3
DOI
出版ステータス出版済み - 4 2016

All Science Journal Classification (ASJC) codes

  • 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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