Contact resistance characteristics of high temperature superconducting bulk - Part V

Hiroyuki Fujita, Katsuya Fukuda, Koichiro Sawa, Masaru Tomita, Masato Murakami, Naomichi Sakai, Izumi Hirabayashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)


A persistent current switch (PCS) is used for superconducting applications, such as superconducting magnetic energy storage (SMES) system. The authors have proposed a mechanical switch of Y-Ba-Cu-O (YBCO) bulk as a mechanical PCS. In this paper, the authors measured the contact resistance of Ag block with convex curvature and Ag-deposited YBCO sample (dAg/YBCO) in order to study in more depth about the effect of the deposited Ag, contributed greatly for reduction of the residual resistance. As the results of experiments and simulation using FEM, it became clear that it was effective for reducing the residual resistance from a point of increasing the contact area by depositing Ag on contact surface. In addition, it was assumed that the main origin of the residual resistance were the constriction resistance depending on the contact area and the deposited Ag resistance proportional to the layer thickness. Therefore, the thickness of the deposited Ag layer had the optimal value, was 0.60μm in this case. These results may also lead to support to design the mechanical PCS in the future.

Original languageEnglish
Title of host publicationElectrical Contacts 2006
Subtitle of host publicationProceedings of the 52nd IEEE Holm Conference on Electrical Contacts
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages7
ISBN (Print)1424405815, 9781424405817
Publication statusPublished - 2006
Externally publishedYes
Event52nd IEEE Holm Conference on Electrical Contacts, Holm 2006 - Montreal, QC, Canada
Duration: 2006 Jul 252006 Jul 27

Publication series

NameElectrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts
ISSN (Print)0361-4395


Conference52nd IEEE Holm Conference on Electrical Contacts, Holm 2006
CityMontreal, QC


  • Contact resistance
  • Deformation analysis
  • Metal deposition
  • Persistent current switch
  • YBCO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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