Preparation and characterization of the high-temperature superconductor YBa2Cu3O7–x
✍ Scribed by A. A. Bahgat; Sh. El-Desouki; E. E. Shaisha; M. A. Kaled; S. Yehia; A. I. Sabry; I. Shaltot
- Publisher
- Springer
- Year
- 1989
- Tongue
- English
- Weight
- 185 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0261-8028
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A practical method was devised for measurements of the diamagnetic response of high temperature superconductor specimens. The method is useful for the study of the temperature and field dependencies of the local magnetic induction and its twodimensional visualisation B(T,H,,x,y) with a resolution of
YBa2CUaOT\_x/Sn (YBCO/Sn) composites sintered at 230 ~ exhibited a percolation threshold for electrical conductivity at 20 vol % Sn, with semiconducting and metallic behaviour below and above it, respectively. The simultaneous decrease in r = dp/d T and Po with increase in Sn content was related to