Contact characteristics for YBCO bulk superconductors

Naoki Yamamoto; Tomokazu Sakai; Koichiro Sawa; Masaru Tomita; Masato Murakami

doi:10.1016/S0921-4534(03)01012-8

Contact characteristics for YBCO bulk superconductors

Naoki Yamamoto, Tomokazu Sakai, Koichiro Sawa, Masaru Tomita, Masato Murakami

Research output: Contribution to journal › Conference article › peer-review

9 Citations (Scopus)

Abstract

We have studied the contact characteristics of two resin-impregnated YBCO (a composite of YBa₂Cu₃O_y and Y ₂BaCuO₅) bulk superconductors in mechanical contact. A switching phenomenon could be observed at a threshold current or a transfer current value in the V-I curves of the YBCO contact. The transfer current exceeded the previous value of 13.5 A at 77 K in the contact when the sample surfaces were carefully polished. The present results suggest that a pair of YBCO blocks might be applicable to the mechanical persistent current switch for superconducting magnetic energy storage and other superconducting systems run in a persistent current mode.

Original language	English
Pages (from-to)	729-733
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	392-396
Issue number	PART 1
DOIs	https://doi.org/10.1016/S0921-4534(03)01012-8
Publication status	Published - 2003 Oct 1
Externally published	Yes
Event	Proceedings of the 15th International Symposium on Superconduc - Yokohama, Japan Duration: 2002 Nov 11 → 2002 Nov 13

Keywords

Contact resistance
Persistent current switch
Transfer current
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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10.1016/S0921-4534(03)01012-8

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Cite this

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title = "Contact characteristics for YBCO bulk superconductors",

abstract = "We have studied the contact characteristics of two resin-impregnated YBCO (a composite of YBa2Cu3Oy and Y 2BaCuO5) bulk superconductors in mechanical contact. A switching phenomenon could be observed at a threshold current or a transfer current value in the V-I curves of the YBCO contact. The transfer current exceeded the previous value of 13.5 A at 77 K in the contact when the sample surfaces were carefully polished. The present results suggest that a pair of YBCO blocks might be applicable to the mechanical persistent current switch for superconducting magnetic energy storage and other superconducting systems run in a persistent current mode.",

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AU - Yamamoto, Naoki

AU - Sakai, Tomokazu

AU - Sawa, Koichiro

AU - Tomita, Masaru

AU - Murakami, Masato

PY - 2003/10/1

Y1 - 2003/10/1

N2 - We have studied the contact characteristics of two resin-impregnated YBCO (a composite of YBa2Cu3Oy and Y 2BaCuO5) bulk superconductors in mechanical contact. A switching phenomenon could be observed at a threshold current or a transfer current value in the V-I curves of the YBCO contact. The transfer current exceeded the previous value of 13.5 A at 77 K in the contact when the sample surfaces were carefully polished. The present results suggest that a pair of YBCO blocks might be applicable to the mechanical persistent current switch for superconducting magnetic energy storage and other superconducting systems run in a persistent current mode.

AB - We have studied the contact characteristics of two resin-impregnated YBCO (a composite of YBa2Cu3Oy and Y 2BaCuO5) bulk superconductors in mechanical contact. A switching phenomenon could be observed at a threshold current or a transfer current value in the V-I curves of the YBCO contact. The transfer current exceeded the previous value of 13.5 A at 77 K in the contact when the sample surfaces were carefully polished. The present results suggest that a pair of YBCO blocks might be applicable to the mechanical persistent current switch for superconducting magnetic energy storage and other superconducting systems run in a persistent current mode.

KW - Contact resistance

KW - Persistent current switch

KW - Transfer current

KW - YBCO

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