Effect of silver in Bi1.7Pb0.3Sr2−xAgxCa2Cu3Oy

Abstract

The oxide superconductor Bi1.7Pb0.3Sr2−xAgxCa2Cu3Oy has been synthesized under the ordinary pressure. The x-ray diffraction spectra of these specimens show the presence of only 2212 phase when x<0.4, and the transition temperature achieved 99 K. With the x increase, the structure of sample transfers to 2223 phase. The investigation indicates that substitution of Sr2+ by Ag1+ increases the distance between layers. This may respond to Tc increase in 2212 phase and 2223 phase form at a relatively low temperature.

Formation of thin Bi(Pb)-Sr-Ca-Cu-O films byex situmagnetron sputtering

“…According to [16][17][18] the doping with silver positively influences electrical properties and crystal structure of the bulk BSCCO superconductors. For example in the 2212 system the increase of T ce up to 99 K was observed at the partial substitution of Sr on Ag [16]. In [17] it was noted that for Ag-doped 2223 samples T ce increased to 118 K.…”