Magnetic properties of melt textured YBa2Cu3O7-delta with TiO2 dopant


YANMAZ E. , BALCI S. , Kucukomeroglu T.

MATERIALS LETTERS, vol.54, pp.191-199, 2002 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 54
  • Publication Date: 2002
  • Doi Number: 10.1016/s0167-577x(01)00562-6
  • Title of Journal : MATERIALS LETTERS
  • Page Numbers: pp.191-199
  • Keywords: high-T-c superconductors, TiO2 substitution, decomposition magnetic properties, levitation force, SUPERCONDUCTING PROPERTIES, SILVER SOLUBILITY, SYSTEM

Abstract

Bulk YBa2Cu3O7-delta samples, added with TiO2 in the range 0 -10 wt.%, have been prepared by the flame-quench-meltgrowth (FQMG) method and their microstructures have been defined by XRD analysis and optical microscopy, It was found that increasing the content of TiO2 in Y123 from 1% to 5% caused a decrease of superconducting transition temperature, and from 7 to 10 wt.% caused a slight increase of transition temperature, Magnetic measurements in the zero-field-cooled (ZFC) and field-cooled (FC) regimes for different magnetic fields have been performed on these samples in the temperature range 77-300 K using an inductance-meter operating at 1 kHz. Typical repulsive and attractive magnetic forces as a function of distance, and magnetic history between a permanent magnet and YBCO sample cooled with and without magnetic field are described. (C) 2002 Elsevier Science B.V. All rights reserved.