Investigation of some physical properties of silver diffusion-doped YBa2Cu3O7-x superconductors


Gorur O., Terzioglu C., Varilci A., Altunbas M.

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, cilt.18, ss.1233-1237, 2005 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 18 Konu: 9
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1088/0953-2048/18/9/016
  • Dergi Adı: SUPERCONDUCTOR SCIENCE & TECHNOLOGY
  • Sayfa Sayıları: ss.1233-1237

Özet

Silver diffusion in superconducting YBa2Cu3O7-x (YBCO) has been studied over the temperature range 500-800 degrees C by x-ray diffraction measurements. The diffusion coefficient of Ag in YBCO was determined from the observed increase (0.12%) in the lattice parameter c as compared with the undoped sample. It was shown that the diffusion coefficient of Ag in the temperature range 500-800 degrees C changed from 1 x 10(-10) to 5 x 10(-9) cm(2) s(-1) with an activation energy of about 1.06 eV. For the Ag-doped sample, the critical transition temperature and the critical current density were increased from 90 to 92.5 K and from 60 to 98 A cm(-2) respectively in comparison with those of undoped YBCO. The possible reasons for the observed increases in T-c and J(c) due to Ag diffusion were discussed.