The modulation of the peak effect in melt-processed (Sm-Eu)123 superconductors with compositional fluctuations

A. Hu, H. Zhou, D. X. Huang, N. Chikumoto, N. Sakai, M. Murakami

研究成果: Conference article査読

4 被引用数 (Scopus)

抄録

The peak effect in magnetization loops of melt-processed (SmxEu1-x)Ba2Cu3O7-δ superconductors is manipulated by varying the Sm/Eu ratio in the initial composition. In all the samples the peak field BP(T), at which the magnetization moment reaches the maximum, was linearly temperature dependent. The fitting to such a relationship unveils a slightly lower critical temperature Tcp than the bulk Tc at zero field. A kink appears in the reversible magnetization moment of the field dependence of superconducting transition. This kink temperature Tck(B) is also a linear function of applied field. Transmission electron microscopy (TEM) observation confirms the presence of nano-scale regular compositional modulation arising from local RE-Ba substitution, which is weakened with increasing Eu concentration. The peak effect is thus attributed to the scattering of local Tc due to compositional fluctuation.

本文言語English
ページ(範囲)3755-3758
ページ数4
ジャーナルIEEE Transactions on Applied Superconductivity
13
2 III
DOI
出版ステータスPublished - 2003 6月
外部発表はい
イベント2002 Applied Superconductivity Conference - Houston, TX, United States
継続期間: 2002 8月 42002 8月 9

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
  • 電子工学および電気工学

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