Contact characteristics for bulk superconductors

Naoki Yamamoto, Takuya Imaizumi, Koichiro Sawa, Masaru Tomita, Masato Murakami, Izumi Hirabayashi

研究成果: Article査読

5 被引用数 (Scopus)

抄録

We have studied the contact characteristics of two resin-impregnated bulk superconductors in mechanical contact. In the previous work, it was confirmed that a switching phenomenon between high and low resistance range took place at a threshold current or a transfer current value in the V-I curves of YBCO contact. In this paper we found that the transfer current exceeded 30 A and the contact resistance were decreased to 40 μΩ at 77 K in the mechanical contact when the sample surfaces were carefully polished. Moreover we succeed in decreasing the contact resistance to 6 μΩ with depositing the metal on the contact surface. The present results suggest that a pair of superconducting blocks might be applicable to the mechanical persistent current switch for superconducting magnetic energy storage and other superconducting systems running in a persistent current mode.

本文言語English
ページ(範囲)662-667
ページ数6
ジャーナルPhysica C: Superconductivity and its applications
412-414
SPEC. ISS.
DOI
出版ステータスPublished - 2004 10

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
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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