Flux pinning in melt-processed ternary (Nd-Eu-Gd) and Nd-based superconductors

A. K. Pradhan, M. Muralidhar, Y. Feng, S. Shibata, M. Murakami, K. Nakao, N. Koshizuka

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

We report on the flux pinning and optimization of melt-processed ternary (Nd-Eu-Gd)Ba2Cu3O7-δ bulk materials using magnetization and magneto-transport (quasi-flux transformer technique) measurements. The highest flux pinning was observed for the optimal annealing condition, where twin planes act as correlated pinning in the presence of the optimal second-phase addition. The addition of Ag decreases low-field critical current density, whereas high-field behavior does not change drastically. The results were compared with NdBa2Cu3O7-δ single crystals that show various vortex states with increasing defect density. The melt-processed samples demonstrate very similar behavior to the single crystal. The interplay between the point defect and the twin planes resulting an entangled vortex liquid-state remains valid for both single crystals and melt-processed samples.

Original languageEnglish
Pages (from-to)3706-3711
Number of pages6
JournalIEEE Transactions on Applied Superconductivity
Volume11
Issue number1 III
DOIs
Publication statusPublished - 2001 Mar 1
Event2000 Applied Superconductivity Conference - Virginia Beach, VA, United States
Duration: 2000 Sep 172000 Sep 22

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Keywords

  • Critical current density
  • Flux pinning
  • Melt-processed bulk materials
  • Vortex phase-transition

ASJC Scopus subject areas

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

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