Effect of vanadium substitution on the microstructural and superconducting properties of Tl2Ba2Ca2-xVxCu3Oy superconductors

Erbilen E., Cavdar Ş., KORALAY H., Gunen A.

PHYSICA B-CONDENSED MATTER, vol.413, pp.36-39, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 413
  • Publication Date: 2013
  • Doi Number: 10.1016/j.physb.2012.12.038
  • Journal Name: PHYSICA B-CONDENSED MATTER
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.36-39
  • Gazi University Affiliated: Yes

Abstract

In this study, effects of the vanadium substitution for Ca sites on the TI-2223 superconductor have been studied. The samples with nominal composition TI2Ba2Ca2-xVxCu3Oy (x=0.0, 0.1, 0.3, 0.5, 0.7) have been prepared by the solid-state reaction method. The obtained samples have been characterized by x-ray diffraction, scanning electron microscope and the superconductivity of these samples have been investigated by electrical resistivity. X-ray powder diffraction pattern showed that there are some impurity phases as well as TI-1223 main phase. Although the critical temperature (T-c.) has increased for the first two substitution values, for the last two substitution values T-c. has decreased. Higher amounts of vanadium substitution have caused non-superconductor. As a result, low vanadium substitution for Ca sites improved the TI-2223 superconducting properties. (C) 2013 Elsevier B.V. All rights reserved.