Determination of the material parameters of a melt-textured YBCO superconductor by DC magnetization analysis

Celebi S., Ozturk A., Yanmaz E., Kopya A.

JOURNAL OF ALLOYS AND COMPOUNDS, vol.298, pp.285-290, 2000 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 298
  • Publication Date: 2000
  • Doi Number: 10.1016/s0925-8388(99)00644-1
  • Journal Name: JOURNAL OF ALLOYS AND COMPOUNDS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.285-290
  • Karadeniz Technical University Affiliated: Yes

Abstract

We report the isothermal magnetization cut-yes of a YBCO superconducting sample prepared by a flame-quench-melt-growth (FQMG) method. Hysteresis loops have been calculated and analyzed in the framework of a critical state model including the Meissner current. The bulk critical current and Meissner current as a function of applied field were extracted, and the volume fraction of the grains, f(g), has been estimated to be 0.64 from a comparison of the theoretical and experimental M-H hysteresis loops. The lower critical field, mu(0)H(c1), was found to be 14.4 mT. (C) 2000 Elsevier Science S.A. All rights reserved.