Magnetic, physical and structural properties of melt textured YBa2Cu3O7-x with TiO2 doped

SUMMARY Magnetic, Phsical and Structural Properties of Melt Textured YBa2Cu307-x Superconductors with TİO2 Doped Bulk YBa2Cu307-x samples, doped with TİO2 in the range 0-10 wt.% have been prepared by the Flame-Quench-Melt-Growth (FQMG) method and their microstructures have been defined by XRD analysis and optical microscopy. It was found that increasing the content of TİO2 in Y123 from 1% to 5% caused a decrease of superconducting transition temperature, and from 7-10% 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. Keywords: High-Tc Superconductors, TİO2 substitution, decomposition, Magnetic Properties, Levitation Force. VI