Preliminary study of a superconducting bulk magnet for the Maglev train

Hiroyuki Fujimoto, Hiroki Kamijo, Takamitsu Higuchi, Yuichi Nakamura, Ken Nagashima, Masato Murakami, Sang Im Yoo

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

One of the prospective applications of high critical temperature superconductors is a superconducting magnet for the magnetically levitated (Maglev) train. Recent development shows that REBaCuO and LRE(light rare-earth)BaCuO superconductors prepared by melt processes have a high critical current density at 77 K and high magnetic fields. LRE-Ba-Cu-O bulk superconductors melt-processed in a reduced oxygen atmosphere, named oxygen-controlled-melt-growth (OCMG) process are very promising for high field application as a superconducting permanent magnet with liquid nitrogen refrigeration. Compared to good quality melt-grown REBaCuO bulks, LREBaCuO bulks exhibit larger critical current densities in high magnetic fields and much improved irreversibility field at 77 K, implying that more effective flux pinning can be realized in a commercially feasible way. In this study, we discuss the possibility of a superconducting bulk magnet for a Maglev train. A preliminary design of the bulk magnet and also melt processing for REBaCuO and LREBaCuO bulk superconductors and their characteristic superconducting properties are presented.

Original languageEnglish
Pages (from-to)301-304
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume9
Issue number2 PART 1
DOIs
Publication statusPublished - 1999
Externally publishedYes

Fingerprint

Superconducting materials
Magnets
magnets
Superconducting magnets
superconducting magnets
Rare earths
critical current
rare earth elements
Critical current density (superconductivity)
Magnetic fields
current density
Oxygen
Flux pinning
flux pinning
oxygen
Liquid nitrogen
Refrigeration
magnetic fields
permanent magnets
liquid nitrogen

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

Fujimoto, H., Kamijo, H., Higuchi, T., Nakamura, Y., Nagashima, K., Murakami, M., & Yoo, S. I. (1999). Preliminary study of a superconducting bulk magnet for the Maglev train. IEEE Transactions on Applied Superconductivity, 9(2 PART 1), 301-304. https://doi.org/10.1109/77.783295

Preliminary study of a superconducting bulk magnet for the Maglev train. / Fujimoto, Hiroyuki; Kamijo, Hiroki; Higuchi, Takamitsu; Nakamura, Yuichi; Nagashima, Ken; Murakami, Masato; Yoo, Sang Im.

In: IEEE Transactions on Applied Superconductivity, Vol. 9, No. 2 PART 1, 1999, p. 301-304.

Research output: Contribution to journalArticle

Fujimoto, H, Kamijo, H, Higuchi, T, Nakamura, Y, Nagashima, K, Murakami, M & Yoo, SI 1999, 'Preliminary study of a superconducting bulk magnet for the Maglev train', IEEE Transactions on Applied Superconductivity, vol. 9, no. 2 PART 1, pp. 301-304. https://doi.org/10.1109/77.783295
Fujimoto, Hiroyuki ; Kamijo, Hiroki ; Higuchi, Takamitsu ; Nakamura, Yuichi ; Nagashima, Ken ; Murakami, Masato ; Yoo, Sang Im. / Preliminary study of a superconducting bulk magnet for the Maglev train. In: IEEE Transactions on Applied Superconductivity. 1999 ; Vol. 9, No. 2 PART 1. pp. 301-304.
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