Superconductivity Without Relation to Valence Electrons in (Fe, Zn) Doped YBCO Systems

作者：Zhang, Yufeng^*; Hu, Sulei; Wang, Dandan; Liu, Yongsheng; Li, Pinglin

来源：Journal of Low Temperature Physics, 2010, 160(1-2): 49-57.

DOI：10.1007/s10909-010-0171-x

• Fe doped YBCO
• Simulated calculations
• Positron annihilation
• Cluster effect
• Valence electron density

We systematically investigated YBa2Cu3-x (Fe, Zn) (x) O7-delta (x=0.0 similar to 0.5) cuprates through XRD, the test of superconductivity, oxygen contents, positron annihilation technology and simulated calculations. With the Fe and Zn doped concentration increasing, the transition temperature T (c) drops from 92 K for the undoped YBa2Cu3O7-delta . The form of the Fe or Zn ion cluster in both doping samples illuminates the variation of the oxygen content. T

• 出版日期2010-7
• 单位郑州大学; 上海电力大学