Perfect fits of Jc-B dependencies in NEG-123 bulk samples with 30% Gd-211 fine particles

M. Jirsa, M. Muralidhar, M. Murakami

研究成果: Article査読

2 被引用数 (Scopus)


Magnetization hysteresis loops (MHL) were measured on two NEG-123 bulk samples with addition of 30% Gd-211 fine (sub-micron) particles in the temperature range 65-88 K. These two samples possessed significantly different second-to-central peak heights ratios. Both sets of the Jc-B curves could be, however, fitted with a high precision by the same combined analytical function Jc(B) = Jcpexp(-αB/Bp) + Jspbp exp[(1 - (B/Bp)n)/n] in all investigated temperatures. The pinning regimes governing formation of the central and second peak could be separated in this way. As far as the central peak contribution to the MHL becomes usually negligible at around Bp, the shape of Jc(B) above Bp is governed by only a high-field pinning mechanism. The central peak extends to this field region only at temperatures very close to Tc. Good scaling of the pinning force density with temperature gives a further support to the above conclusions.

ジャーナルPhysica C: Superconductivity and its applications
出版ステータスPublished - 2001 8月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学


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