Study of (Nd,Sm)422 solid solution and its effect on the melt process of Nd123 bulk superconductors

J. Yoshioka, K. Iida, M. Murakami

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We have studied the range of Nd-Sm solid solution in the (Nd1-x,Smx)4-2yBa2+2y Cu2-yOz system in the Nd123 matrix. X-ray diffraction studies for the sintered (Nd1-x,Smx)4-2yBa2+2y Cu2-yOz powders in air showed that the samples were a single phase 422 in the range of x = 0-0.3, showing that Sm substituted on Nd site in Nd422. It was also found that Sm is soluble up to x = 0.3 in (Nd1-x,Smx)3.6Ba2.4 Cu1.8Oz. We then fabricated Nd123/Nd422 bulk superconductors by melt processing, in which Nd123 powder is mixed with 20 mol% (Nd0.8,Sm0.2)3.6Ba2.4 Cu1.8Oz and 1 wt.% CeO2. The sample exhibited high Tc of 97 K and sharp superconducting transition when melt-processed under controlled oxygen partial pressure (PO2) of 0.01 atm.

Original languageEnglish
Pages (from-to)401-405
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume354
Issue number1-4
DOIs
Publication statusPublished - 2001 May 1

Keywords

  • Critical current density
  • Nd-Sm solid solution
  • Nd123
  • Nd422
  • Transition temperature

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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