An effect of interface condition on electrical contact characteristics using Y-Ba-Cu-O bulk superconductor

H. Fujita, K. Fukuda, M. Tomita, M. Murakami, N. Sakai, I. Hirabayashi, K. Sawa

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Abstract

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 YBCO bulk as a mechanical PCS. This paper focused on the current carrying area (called a-spot) on contact interfaces and presented an effect of interface condition on electrical contact characteristics in order to clarify the contact mechanism. The authors prepared various samples with different surface treatments (roughness and washing), and measured the contact voltage with a four-terminal method. YBCO deposited with metal (silver and indium) layer samples were similarly subjected to the contact voltage measurements. It was found that the contact interface conditions strongly affect the contact characteristics.

Original languageEnglish
Pages (from-to)415-419
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume463-465
Issue numberSUPPL.
DOIs
Publication statusPublished - 2007 Oct 1

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Keywords

  • Contact interface
  • Contact resistance
  • Metal deposition
  • Persistent current switch
  • YBCO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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