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

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

Research output: Contribution to journalArticle

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
Externally publishedYes

Fingerprint

Flux pinning
flux pinning
Superconducting materials
Single crystals
single crystals
Vortex flow
vortices
Defect density
Point defects
transformers
point defects
Magnetization
critical current
Annealing
current density
Fluxes
magnetization
optimization
annealing
defects

Keywords

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

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

Flux pinning in melt-processed ternary (Nd-Eu-Gd) and Nd-based superconductors. / Pradhan, A. K.; Miryala, Muralidhar; Feng, Y.; Shibata, S.; Murakami, Masato; Nakao, K.; Koshizuka, N.

In: IEEE Transactions on Applied Superconductivity, Vol. 11, No. 1 III, 03.2001, p. 3706-3711.

Research output: Contribution to journalArticle

Pradhan, A. K. ; Miryala, Muralidhar ; Feng, Y. ; Shibata, S. ; Murakami, Masato ; Nakao, K. ; Koshizuka, N. / Flux pinning in melt-processed ternary (Nd-Eu-Gd) and Nd-based superconductors. In: IEEE Transactions on Applied Superconductivity. 2001 ; Vol. 11, No. 1 III. pp. 3706-3711.
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