29 June 1994 Flux pinning in superconductor/normal metal heterostructures
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We have shown, within the Ginzburg-Landau theory, that the interaction between a single vortex and a normal metal microdefect in the high Tc superconducting matrix can cause high critical current densities jc. The interaction is primarily magnetic, except at very low temperatures T, where the core interaction is dominant. For a lattice of vortices commensurate with an array of defects in a parallel magnetic field H, strong magnetic pinning is obtained, with a non-monotonic critical current dependence on H, and with jc of the order of 107 - 108 A/cm2.
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Ljiljana Dobrosavljevic-Grujic, Vesna Prokic, Dragomir Davidovic, "Flux pinning in superconductor/normal metal heterostructures", Proc. SPIE 2157, Superconducting Superlattices and Multilayers, (29 June 1994); doi: 10.1117/12.179170; https://doi.org/10.1117/12.179170

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