Pinning centres in NEG-123 active at liquid oxygen temperature (90.2 K)

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We present a new type of (Nd, Eu, Gd) Ba2Cu3Oy 'NEG-123' material for superconducting permanent magnets for use at liquid oxygen temperature (90.2 K). This material exhibits an exceptionally high flux pinning up to the close vicinity of Tc. The improvement of the flux pinning was achieved by externally added ball-milled secondary phase particles that partially transformed during the technological process to a new type of nanometre-scale Zr-rich particles. The critical current density improved by one order of magnitude at 77 and 90 K as compared to those of other RE-123 type materials. The exceptional trapped field at 90.2 K enabled a levitation experiment at liquid oxygen temperature, which proved that these materials can be used as superconducting permanent magnets at 90 K. We point out that this technology can be easily adapted for mass production.

Original languageEnglish
JournalSuperconductor Science and Technology
Volume17
Issue number2
DOIs
Publication statusPublished - 2004 Feb

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liquid oxygen
flux pinning
superconducting magnets
permanent magnets
Oxygen
Flux pinning
Superconducting magnets
levitation
Liquids
Permanent magnets
balls
critical current
current density
Temperature
temperature
Experiments

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Pinning centres in NEG-123 active at liquid oxygen temperature (90.2 K). / Miryala, Muralidhar; Sakai, Naomichi; Jirsa, M.; Murakami, Masato; Koshizuka, N.

In: Superconductor Science and Technology, Vol. 17, No. 2, 02.2004.

Research output: Contribution to journalArticle

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