THE EFFECT OF AG DIFFUSION ON THE CRYSTAL-STRUCTURE AND ELECTRICAL-PROPERTIES OF BI(PB)SRCACUO SUPERCONDUCTORS


COMERT H., ALTUNBAS M., DZHAFAROV T., KUCUKOMEROGLU T. , ASADOV Y., KARAL H.

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, cilt.7, ss.824-827, 1994 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 7 Konu: 11
  • Basım Tarihi: 1994
  • Doi Numarası: 10.1088/0953-2048/7/11/009
  • Dergi Adı: SUPERCONDUCTOR SCIENCE & TECHNOLOGY
  • Sayfa Sayıları: ss.824-827

Özet

X-ray diffraction of Bi(Pb)SrCaCuO compounds, prepared by a conventional solid-state technique, were measured from 20 degrees C to 500 degrees C. It was found that diffusion of Ag (600-825 degrees C) in Bi ceramics stimulates a high degree of grain orientation along the c-axis. In Ag-doped samples the lattice parameters a and c are decreased (in comparison with the undoped samples) and their dependences on temperature reveal a non-linear character. The critical temperature, determined from the resistivity measurements, for Ag-doped samples increased to 118 K. Ag diffusion at 790 degrees C increases the critical current density more than twice. The influence of low annealing temperature for Ag-doped samples on critical current density was also investigated. These results are discussed on the basis of precipitation of Ag solid solution in Bi(Pb)SrCaCuO superconductors.