Contact characteristics of mechanically mated Y-Ba-Cu-O bulks with a deposited metal layer

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

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We measured the contact resistance of a silver block with convex curvature and silver, a melt-textured Y-Ba-Cu-O sample (YBCO), and a silver-deposited YBCO sample (dAg/YBCO) to clarify the main source of the resistance. The study was performed with the development of a persistent current switch in mind. The contact resistance was largest in the Ag/YBCO contact. It decreased by increasing the thickness of the deposited-Ag layer for the Ag/dAg/YBCO contact. However, the smallest resistance of the Ag/dAg/YBCO contact was even larger than that of the Ag/Ag contact. This is probably due to the fact that the Ag/dAg/YBCO contact has two interfaces. The present result suggests that the contact area is dominant in controlling the contact resistance. A simulation study of the contact area with a finite element method (FEM) also supported this idea.

Original languageEnglish
Pages (from-to)S607-S611
JournalSuperconductor Science and Technology
Volume19
Issue number7
DOIs
Publication statusPublished - 2006 Jul 1

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ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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