Filamentary superconductivity have been observed below Tc of 14 K for sintered-polycrystalline (Pb0.5Cu0.5)2(Ba0.5Sr 0.5)2 YCu2O8 samples. Low electrical resistivity shows that this semiconducting sample is near the boundary of metal-insulator transition. The observed filamentary superconductivity indicates that the oxygen concentration of the sample (Pb0.5Cu0.5)2(Ba0.5Sr 0.5)2 YCu2O8-δ is inhomogeneous. The oxygen off-stoichiometric parameter 6 plays the role of controlling the variation of free charge carriers in this electronically inhomogeneous sample where part of the sample is across the transition boundary and thus becomes superconducting.
|頁（從 - 到）||579-582|
|期刊||Chinese Journal of Physics|
|出版狀態||已發佈 - 1996|
ASJC Scopus subject areas
- 物理與天文學 (全部)