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

4 引用 (Scopus)


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.

ジャーナルIEEE Transactions on Applied Superconductivity
発行部数2 III
出版物ステータスPublished - 2003 6 1
イベント2002 Applied Superconductivity Conference - Houston, TX, United States
継続期間: 2002 8 42002 8 9


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering