Disordering Transitions in Vortex Matter: Peak Effect and Phase Diagram

Details Disordering Transitions in Vortex Matter: Peak Effect and Phase Diagram Disordering Transitions in Vortex Matter: Peak Effect and Phase Diagram

2000-08-23

arxiv.org/abs/cond-mat/0008350v1

Physica C 384, 143 (2003)

Physics

Condensed Matter

Superconductivity

4 pages, 4 postscript figures

Scientific paper

10.1016/S0921-4534(02)01799-9

Using numerical simulations of magnetically interacting vortices in disordered layered superconductors we obtain the static vortex phase diagram as a function of magnetic field and temperature. For increasing field or temperature, we find a transition from ordered straight vortices to disordered decoupled vortices. This transition is associated with a peak effect in the critical current. For samples with increasing disorder strength the field at which the decoupling occurs decreases. Long range, nonlinear interactions in the c-axis are required to observe the effect.

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