The type II like superconducting transition has been observed in the regular lattice of interconnected In grains in the opal template. Effectively this matenal is nanosize wire mesh made from type I superconductor. With the decrease of the cross-section of In component in the metal-dielectric nanocomposite the increase of the critical magnetic field was observed. The observed relation between the critical field and the effective thickness of In nanostructures correlates ...
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