Growth of a vortex polycrystal in type II superconductors

Details Growth of a vortex polycrystal in type II superconductors Growth of a vortex polycrystal in type II superconductors

2003-12-15

arxiv.org/abs/cond-mat/0312382v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.92.257004

We discuss the formation of a vortex polycrystal in type II superconductors from the competition between pinning and elastic forces. We compute the elastic energy of a deformed grain boundary, that is strongly non-local, and obtain the depinning stress for weak and strong pinning. Our estimates for the grain size dependence on the magnetic field strength are in good agreement with previous experiments on NbMo. Finally, we discuss the effect of thermal noise on grain growth.

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