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Crystal growth and transport current properties of cylindrical (YSmNd)- Ba-Cu-O superconductors by zone melt growth method

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2011, 21(5), pp.199-204
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering

So-Jung Kim 1 Park Jong Kuk 2

1한중대학교
2강원대학교

Accredited

ABSTRACT

(YSmNd)1.8Ba2.4Cu3.4O7 − x [(YSN)1.8] high Tc superconductor was directionally grown by zone melt growth process,in air atmosphere. In this study, optimum melting temperature and growth rate were 1100oC and 3.5 mm/hr, respectively. The microstructure of well-textured (YSN)1.8 samples were examined by XRD, optical microscopy, TEM and SQUID magnetometer. The critical current density of these samples were measured by the direct transporting current method. In the observation using an optical microscopy, nonsuperconducting (YSmNd)2BaCuO5[(YSN)211] inclusions of (YSN)1.8 superconductor uniformly distributed within the superconducting (YSmNd)Ba2Cu3Ox[(YSN)123] matrix. The directionally melt-textured (YSN)1.8 superconductor showed an onset Tc ≥ 90 K and sharp superconducting transition. The transport Jc values were 830 A and 3.93 × 104 (A/cm2) at 77 K self-field, respectively.

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