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

M. Muralidhar, N. Sakai, M. Jirsa, M. Murakami, N. Koshizuka

研究成果: Article査読

10 被引用数 (Scopus)


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.

ジャーナルSuperconductor Science and Technology
出版ステータスPublished - 2004 2月 1

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 凝縮系物理学
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学


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