A superconducting joint for GdBa2Cu3O 7-δ-coated conductors

Yeonjoo Park, Myungwhon Lee, Heesung Ann, Yoon Hyuck Choi, Haigun Lee

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

Second-generation (2G) GdBCO-coated conductors (CCs) are promising for superconducting magnet applications because of their high critical current (Ic) density, low dependency of the c on the external magnetic field, good mechanical properties and reasonable cost, which offer opportunities to develop ultra-high-field magnets. However, they have not been used in hightemperature superconducting (HTS) applications with persistent current mode (PCM) operation such as nuclear magnetic resonance/magnetic resonance imaging magnets owing to unavailability of fabrication techniques for proper joining and contacts. Here we report a resistance-free joint, termed a 'superconducting joint', for 2G GdBCO CCs that forms a direct connection to establish a superconducting closed loop for PCM operation. The Ic value of the joined CCs is identical to that of the parent conductors in a liquid nitrogen bath (77 K). Moreover, the initially induced magnetic field of a model GdBCO coil containing a superconducting joint is maintained without decreasing, indicating the complete absence of electrical resistance. Thus, this fabrication method is a unique practical solution for lengthening the 2G HTS CCs and, more importantly, achieving PCM operation in 2G HTS magnet applications, including ultra-high-field nuclear magnetic resonance/magnetic resonance imaging magnets generating more than 1 GHz.

Original languageEnglish
Article numbere98
JournalNPG Asia Materials
Volume6
Issue number5
DOIs
Publication statusPublished - 2014 Jan 1

Fingerprint

Conductor
Persistent Current
Magnets
conductors
Superconducting magnets
Magnetic resonance
Nuclear magnetic resonance
Critical current density (superconductivity)
Nuclear Magnetic Resonance
Magnetic fields
Magnetic Resonance Imaging
Imaging techniques
Fabrication
superconducting magnets
Acoustic impedance
Liquid nitrogen
magnetic resonance
Joining
magnets
Magnetic Field

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Modelling and Simulation

Cite this

A superconducting joint for GdBa2Cu3O 7-δ-coated conductors. / Park, Yeonjoo; Lee, Myungwhon; Ann, Heesung; Choi, Yoon Hyuck; Lee, Haigun.

In: NPG Asia Materials, Vol. 6, No. 5, e98, 01.01.2014.

Research output: Contribution to journalArticle

Park, Yeonjoo ; Lee, Myungwhon ; Ann, Heesung ; Choi, Yoon Hyuck ; Lee, Haigun. / A superconducting joint for GdBa2Cu3O 7-δ-coated conductors. In: NPG Asia Materials. 2014 ; Vol. 6, No. 5.
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