Matrix chemical ratio and its optimization for highest flux pinning in ternary (Nd-Eu-Gd)Ba2Cu3Oy

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

研究成果: Article査読

5 被引用数 (Scopus)

抄録

We have fabricated the ternary (Nd, Eu, Gd)Ba2Cu3Oy system with various Nd:Eu:Gd ratios with the aim of optimizing the pinning performance at 77 K. The magnetization measurements suggest that the three elements (Nd, Eu, Gd) contribute to pinning in different manners: Nd mainly enhances flux pinning at low magnetic fields, Eu controls the second peak position and the irreversibility field, while Gd slightly enhances intermediate and high-field Jc values. The scaling analysis of the pinning force density versus the reduced field h = Ha/Hirr showed a peak at h = 0.55. This value is higher than the theoretically predicted highest value of h = 0.5, corresponding to ΔTc pinning. We proved that an excellent flux pinning can be achieved in the entire magnetic field range when sub-micron secondary phase particles are dispersed in the NEG-123 matrix with an optimum Nd:Eu:Gd ratio.

本文言語English
ページ(範囲)688-693
ページ数6
ジャーナルSuperconductor Science and Technology
15
5
DOI
出版ステータスPublished - 2002 5 1
外部発表はい

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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