Contact characteristics for bulk superconductors

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

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)662-667
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Volume412-414
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2004 Oct

Fingerprint

Contact resistance
Superconducting materials
contact resistance
Energy storage
Resins
Metals
Switches
magnetic energy storage
low resistance
high resistance
threshold currents
resins
switches
curves
metals

Keywords

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

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Yamamoto, N., Imaizumi, T., Sawa, K., Tomita, M., Murakami, M., & Hirabayashi, I. (2004). Contact characteristics for bulk superconductors. Physica C: Superconductivity and its Applications, 412-414(SPEC. ISS.), 662-667. https://doi.org/10.1016/j.physc.2004.01.090

Contact characteristics for bulk superconductors. / Yamamoto, Naoki; Imaizumi, Takuya; Sawa, Koichiro; Tomita, Masaru; Murakami, Masato; Hirabayashi, Izumi.

In: Physica C: Superconductivity and its Applications, Vol. 412-414, No. SPEC. ISS., 10.2004, p. 662-667.

Research output: Contribution to journalArticle

Yamamoto, N, Imaizumi, T, Sawa, K, Tomita, M, Murakami, M & Hirabayashi, I 2004, 'Contact characteristics for bulk superconductors', Physica C: Superconductivity and its Applications, vol. 412-414, no. SPEC. ISS., pp. 662-667. https://doi.org/10.1016/j.physc.2004.01.090
Yamamoto, Naoki ; Imaizumi, Takuya ; Sawa, Koichiro ; Tomita, Masaru ; Murakami, Masato ; Hirabayashi, Izumi. / Contact characteristics for bulk superconductors. In: Physica C: Superconductivity and its Applications. 2004 ; Vol. 412-414, No. SPEC. ISS. pp. 662-667.
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