Superconductivity in Hg-substituted BaPb(0.75)Bi(0.25)O(3)

作者：Chen Y L; Cui Y J; Cheng C H; Zhang Y; Lin H T; Zhao Y^*

来源：Physics Letters A, 2009, 373(16): 1482-1485.

DOI：10.1016/j.physleta.2009.02.035

• BaPb(1-x)Bi(x)O(3)
• Superconductivity
• Mercury doping

A series of Hg-doped BaPb(0.75)Bi(0.25)O(3) (BPBO) with a nominal composition of BaPb(0.75-x)Hg(x)Bi(0.25)O(3) (x = 0-0.40 with 0.05 intervals) has been synthesized by solid state reaction. The system shows a lattice parameter expansion and lattice symmetry distortion with Hg doping. Superconducting transition temperature T(c) and superconducting volume fraction of the system decrease with Hg doping level ill the low doping level region (0 <= x <= 0.25) and are nearly fully suppressed at x = 0.25. However, the is recovered %vith further increasing Hg content at x > 0.3. The possible mechanisms of the superconductivity in the low doping level region arid the recovery Of superconductivity in the high doping level region for Fig-doped BPBO system have been discussed.

• 出版日期2009-4-6
• 单位西南交通大学