Persistent Current of Bi2223/Ag Closed Coil in 77 K

Author

Zhuang, Chao ; Gu, Chen ; Chen, D.-X. ; Han, Zhenghe

Volume

17

Issue

2

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

3125

Lastpage

3128

Abstract

Closed superconducting coils made from Bi2223/Ag multi-filamentary tapes were successfully fabricated. By measuring the magnetic flux density at the center of the coil, we were able to observe the persistent current mode of superconducting closed coil in liquid nitrogen. The persistent current measured was 1.39 A and remained unchanging for more than 500 hours after several hours decay. It was estimated from the decay curve that the upper limit resistance of the closed-loop coil was in the order 10^-13 Omega of . Current-voltage characteristic was derived form the decay curve and different models were applied in fitting the experiment data..

Keywords

bismuth compounds; calcium compounds; high-temperature superconductors; lead compounds; multifilamentary superconductors; persistent currents; silver; strontium compounds; superconducting coils; superconducting tapes; Bi₂PbSr₂Ca₂Cu₃O₁₀-Ag - Interface; closed superconducting coils; current 1.39 A; current-voltage characteristic; decay; magnetic flux density; multi-filamentary tapes; persistent current; resistance; Current measurement; Density measurement; Electrical resistance measurement; Magnetic flux density; Magnetic liquids; Multifilamentary superconductors; Nitrogen; Persistent currents; Superconducting coils; Superconducting films; Closed superconducting coils; current-voltage characteristic; persistent current mode;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2007.898954

Filename

4278346