期刊
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
卷 460, 期 -, 页码 408-409出版社
ELSEVIER
DOI: 10.1016/j.physc.2007.03.102
关键词
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. (C) 2007 Elsevier B.V. All rights reserved.
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