Engineering of Jc-B characteristics of RE-Ba-Cu-O melt-textured superconductors

M. Jirsa, V. Zablotskii, M. Muralidhar, K. Iida, M. Murakami

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A skilful combination of different types of pinning centers with the aim to optimize Jc(B) performance of bulk superconductors in a wide range of magnetic fields is demonstrated on melt-textured (Nd,Eu,Gd)Ba2Cu3O7-δ and NdBa2Cu3O7-δ materials. In this contribution we show (i) the distinct effect of different types of micrometer-size secondary phase particles on Jc(B) dependence at low fields; (ii) possibility to produce materials with either high-current densities at moderate fields or with a flat Jc(B) curve extending to high fields, via appropriate choice of Nd:Eu:Gd ratio in NEG-123 matrix; (iii) extremely high-irreversibility field (≈9 T at 77 K) in NEG-123 samples Eu/Gd > 1 and a small content of NEG-211; (iv) twin structure effect in melt-textured Nd-123 doped by micron-sized Nd-211 particles resulting at low temperatures in a field independent Jc(B) extending to very high fields (at 40 K above 10 T). Vast majority of the data could be interpreted in terms of additive contributions of pinning on point-like and large defects.

Original languageEnglish
Pages (from-to)707-712
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume378-381
Issue numberPART 1
DOIs
Publication statusPublished - 2002 Oct 1

Keywords

  • Flux pinning
  • Melt processing
  • REBaCuO

ASJC Scopus subject areas

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

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