Effect of high-temperature heat-treatment on the pinning properties of melt-textured Nd123

N. Chikumoto, J. Yoshioka, M. Otsuka, N. Hayashi, M. Murakami

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39 Citations (Scopus)

Abstract

We have investigated the effect of high-temperature annealing on the superconducting transition and the flux pinning properties of Nd123 melt-textured in 1% O2-Ar. After the high-temperature annealing, a decrease in Jc was observed in most samples even though no appreciable change was observed in Tc. TEM observations and EDX analysis show that the spatial variation of the Nd/Ba ratio almost disappears after high-temperature annealing. Therefore, the observed change in Jc-B properties can be understood by a reduction in the field-induced pinning due to homogenization of Nd/Ba substitution regions. These results strongly support the idea that the secondary peak effect and high pinning performance in Nd123 can be ascribed to the presence of Nd/Ba spatial variation.

Original languageEnglish
Pages (from-to)253-259
Number of pages7
JournalPhysica C: Superconductivity and its applications
Volume281
Issue number2-3
DOIs
Publication statusPublished - 1997 Aug 1

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Keywords

  • Flux Pinning
  • High-temperature annealing
  • Melt-texture
  • NdBaCuO-
  • Peak effect
  • Superconducting transition

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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