3D versus 2D behavior in ceramic Tl2Ba2Ca2Cu3O10−δ high-Tc superconductors

The comprehensive studies of I–V curve characteristics in ceramic Tl2Ba2Ca2Cu3O10−δ(Tl-2223) compounds are carried out in the magnetic field. In low fields, 0≤H≤2000 Oe, the system has well-defined 3D vortex-glass transition and all nonlinear I–V curves above and below Tg(H) can be collapsed into tw...

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Published in:Physica. C, Superconductivity Superconductivity, 1997-08, Vol.282-287, p.2005-2006
Main Authors: Yeh, W.J., Yu, Z.Q.
Format: Article
Language:English
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Summary:The comprehensive studies of I–V curve characteristics in ceramic Tl2Ba2Ca2Cu3O10−δ(Tl-2223) compounds are carried out in the magnetic field. In low fields, 0≤H≤2000 Oe, the system has well-defined 3D vortex-glass transition and all nonlinear I–V curves above and below Tg(H) can be collapsed into two universal lines. In high fields H≥6000 Oe, the system is in a 2D state. The 2D vortex behavior can be described by the 2D vortex-glass scaling, in which all of nonlinear I–V curves can be sealed into a single universal line. When 2000≤H≤6000 Oe, the vortex system undergoes a dimensional crossover. A tentative phase diagram is constructed.
ISSN:0921-4534
1873-2143
DOI:10.1016/S0921-4534(97)01073-3