Influence of the Gd Concentration on Superconducting Properties in Second-Generation High-Temperature Superconducting Wires

P. N. Degtyarenko, A. V. Sadakov,A. V. Ovcharov,A. Yu. Degtyarenko,S. Yu. Gavrilkin, O. A. Sobolevskii,A. Yu. Tsvetkov, B. I. Massalimov

JETP Letters（2023）

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摘要

Systematic studies of second-generation high-temperature superconducting wires with Gd excess relative to the stoichiometric GdBa2Cu3O7 composition are reported. It has been revealed that filamentary defects in the form of non-superconducting Gd2CuO4 phase located along the ab plane are formed during film growth. These inclusions lead to a change in the pinning mechanism of the vortex structure, due to which the peak of the critical current at +15

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