Doping-dependence of the vortex phase diagram of Bi2Sr2Ca2Cu3O10+delta

作者：Piriou A^*; Fasano Y; Giannini E; Fischer O

来源：Physica C-Superconductivity and Its Applications, 2007, 460: 408-409.

DOI：10.1016/j.physc.2007.03.102

• Bi2Sr2Ca2Cu3O10+delta
• vortex phase diagram
• oxygen-doping

We study the effect of oxygen overdoping in the vortex phase diagram of B single crystals. In the overcloped regime we do find a smooth variation of T, with the annealing pressure, indicating that Bi2Sr2Ca2Cu3O10+delta is less sensitive to oxygen-doping than the bilayer Bi2Sr2Ca2Cu3O8+delta compound. Magnetic measurements reveal that oxygen overcloping produces a reduction of the liquid vortex region and increases the second-peak transition field. These findings imply that the coupling between CuO2 planes increases upon overdoping. We find that this anisotropy decrease is steeper in Bi2Sr2Ca2Cu3O10+delta than in Bi2Sr2Ca2Cu3O8+delta for the same doping level.

• 出版日期2007-9-1