Irreversible field determined by pulsed magnetization and compositional fluctuation of melt-processed (Sm, Eu, Gd)Ba2Cu3O 7-δ superconductors

A. Hu, T. Kono, H. Zhou, K. Iida, K. Nakao, N. Sakai, N. Koshizuka, M. Murakami, I. Hirabayashi

研究成果: Article査読

5 被引用数 (Scopus)

抄録

Irreversible fields Birr of melt-processed (Sm, Eu, Gd)Ba 2Cu3O7-δ bulk superconductors with varying (Sm, Eu, Gd)2BaCuO5 concentrations have been measured with pulsed magnetic fields up to 28 T in a temperature range from 55 to 85 K. The temperature dependence of Birr was studied by taking account of the effect of heat generation. In comparison with that including 5 mol% (Sm, Eu, Gd)2BaCuO5 phase the samples with 40 mol% (Sm, Eu, Gd)2BaCuO5 inclusion displayed a lower B irr value for temperatures above 75 K, while Birr was enhanced below 75 K. TEM observation unveiled a sharp contrast between a uniform nano-scaled compositional modulation in compositions with 40% (Sm, Eu, Gd)2BaCuO5 inclusion and an inhomogeneous distribution with very low (Sm, Eu, Gd)2BaCuO5 concentration. The present result could thus be understood in the context of different defect states induced by locally compositional fluctuation.

本文言語English
ページ(範囲)58-63
ページ数6
ジャーナルSuperconductor Science and Technology
18
1
DOI
出版ステータスPublished - 2005 1 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

フィンガープリント

「Irreversible field determined by pulsed magnetization and compositional fluctuation of melt-processed (Sm, Eu, Gd)Ba<sub>2</sub>Cu<sub>3</sub>O <sub>7-δ</sub> superconductors」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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