Superconducting properties and microstructures of Er-Ba-Cu-O superconductor

K. Iida, J. Yoshioka, N. Sakai, M. Murakami

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4 Citations (Scopus)

Abstract

The growth rate of Er-Ba-Cu-O bulk superconductor as a function for undercooling was investigated using an isothermal solidification technique. The behaviour of the growth rate of Er-Ba-Cu-O under various undercooling was similar to that of Y-Ba-Cu-O. Furthermore, macro-segregation of Er211 was also observed in the a and c growth regions. However, macro-segregation of Er211 was not observed in the Er123 crystal fabricated by a continual slow cooling method far from the seed crystal. The optimum concentration of Er211 was determined to be Er123:Er211 = 3:1 on the basis of microstructure analysis and SQUID measurements. Furthermore, the trapped field capability as well as the critical current density of Er-Ba-Cu-O bulk superconductor with an optimum composition fabricated by a continual slow cooling method employing very small particles of Er211 was dramatically improved.

Original languageEnglish
Pages (from-to)699-706
Number of pages8
JournalSuperconductor Science and Technology
Volume16
Issue number6
DOIs
Publication statusPublished - 2003 Jun 1

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ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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