Conductivity and Superconductivity of (Bi,Pb)4Sr3Ca3Cu4Ox Glass-Ceramics |
| M. Gazda, B. Kusz and E. Sobiechowska
Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Narutowicza 11/12, 80-952 Gdańsk, Poland |
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| (Bi,Pb)-Sr-Ca-Cu-O glasses, annealed in proper conditions, transform into a granular metal and superconductor. As a result of annealing oxide superconductors belonging to the bismuth family (Bi,Pb)2Sr2CuOx, (Bi,Pb)2Sr2 CaCu2Ox, and (Bi,Pb)2Sr2Ca2Cu3Ox crystallize. (Bi,Pb)-Sr-Ca-Cu-O glass-ceramic samples were obtained by annealing the amorphous solid at temperatures between 500°C and 870°C. Their microstructure was studied with scanning electron microscopy, atomic force microscopy, and X-ray diffraction. The temperature dependence of resistivity in annealed samples was studied in a temperature range from 3 K to 300 K. In this work we present the influence of the microstructure on the electrical properties of the granular and disordered material composed of the 2201 and 2212 grains embedded in the nonmetallic matrix. |
| DOI: 10.12693/APhysPolA.111.713 PACS numbers: 74.72.Hs, 72.80.Ng |