Electrical contact characteristics of mechanically mated Y-Ba-Cu-O bulks with deposited metal layer

T. Imaizumi; K. Sawa; M. Tomita; M. Murakami; N. Sakai; I. Hirabayashi

doi:10.1016/j.physc.2005.03.049

Electrical contact characteristics of mechanically mated Y-Ba-Cu-O bulks with deposited metal layer

T. Imaizumi, K. Sawa, M. Tomita, M. Murakami, N. Sakai, I. Hirabayashi

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

Abstract

We have measured contact resistances between two bulk YBCO superconductor blocks with the application to a persistent current switch (PCS) in mind. In order to reduce a contact resistance, we deposited indium and silver on the sample surfaces. The resistance was reduced by increasing the thickness of the deposited metal layers, but it saturated when the thickness reached a certain level. The saturation thickness was much smaller in indium than silver. Such a difference is understandable by considering the hardness of these two metals. The resistance was also reduced by increasing the mechanical load. Overloading however caused the coupling of metal layers, resulting in the peeling off of the deposited layers when the switch was opened.

Original language	English
Pages (from-to)	815-820
Number of pages	6
Journal	Physica C: Superconductivity and its applications
Volume	426-431
Issue number	I
DOIs	https://doi.org/10.1016/j.physc.2005.03.049
Publication status	Published - 2005 Oct 1
Event	Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity - Duration: 2004 Nov 23 → 2004 Nov 25

Keywords

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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title = "Electrical contact characteristics of mechanically mated Y-Ba-Cu-O bulks with deposited metal layer",

abstract = "We have measured contact resistances between two bulk YBCO superconductor blocks with the application to a persistent current switch (PCS) in mind. In order to reduce a contact resistance, we deposited indium and silver on the sample surfaces. The resistance was reduced by increasing the thickness of the deposited metal layers, but it saturated when the thickness reached a certain level. The saturation thickness was much smaller in indium than silver. Such a difference is understandable by considering the hardness of these two metals. The resistance was also reduced by increasing the mechanical load. Overloading however caused the coupling of metal layers, resulting in the peeling off of the deposited layers when the switch was opened.",

keywords = "Contact resistance, Metal deposition, Persistent current switch, YBCO",

author = "T. Imaizumi and K. Sawa and M. Tomita and M. Murakami and N. Sakai and I. Hirabayashi",

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T1 - Electrical contact characteristics of mechanically mated Y-Ba-Cu-O bulks with deposited metal layer

AU - Imaizumi, T.

AU - Sawa, K.

AU - Tomita, M.

AU - Murakami, M.

AU - Sakai, N.

AU - Hirabayashi, I.

PY - 2005/10/1

Y1 - 2005/10/1

N2 - We have measured contact resistances between two bulk YBCO superconductor blocks with the application to a persistent current switch (PCS) in mind. In order to reduce a contact resistance, we deposited indium and silver on the sample surfaces. The resistance was reduced by increasing the thickness of the deposited metal layers, but it saturated when the thickness reached a certain level. The saturation thickness was much smaller in indium than silver. Such a difference is understandable by considering the hardness of these two metals. The resistance was also reduced by increasing the mechanical load. Overloading however caused the coupling of metal layers, resulting in the peeling off of the deposited layers when the switch was opened.

AB - We have measured contact resistances between two bulk YBCO superconductor blocks with the application to a persistent current switch (PCS) in mind. In order to reduce a contact resistance, we deposited indium and silver on the sample surfaces. The resistance was reduced by increasing the thickness of the deposited metal layers, but it saturated when the thickness reached a certain level. The saturation thickness was much smaller in indium than silver. Such a difference is understandable by considering the hardness of these two metals. The resistance was also reduced by increasing the mechanical load. Overloading however caused the coupling of metal layers, resulting in the peeling off of the deposited layers when the switch was opened.

KW - Contact resistance

KW - Metal deposition

KW - Persistent current switch

KW - YBCO

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