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Growth of a vortex polycrystal in type II superconductors

Paolo Moretti·M. -Carmen Miguel·Michael Zaiser·Stefano Zapperi
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Abstract

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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Paolo Moretti, M. -Carmen Miguel, Michael Zaiser, Stefano Zapperi. 2003-12-15. Growth of a vortex polycrystal in type II superconductors. https://doi.org/10.1103/physrevlett.92.257004

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