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

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Abstract

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% Gd is clearly observed.

About the authors

P. N. Degtyarenko

Joint Institute for High Temperatures, Russian Academy of Sciences

Email: degtyarenkopn@gmail.com
125412, Moscow, Russia

A. V. Sadakov

Lebedev Physical Institute, Russian Academy of Sciences

Email: degtyarenkopn@gmail.com
119991, Moscow, Russia

A. V. Ovcharov

National Research Center Kurchatov Institute

Email: degtyarenkopn@gmail.com
123182, Moscow, Russia

A. Yu. Degtyarenko

Lebedev Physical Institute, Russian Academy of Sciences

Email: degtyarenkopn@gmail.com
119991, Moscow, Russia

S. Yu. Gavrilkin

Lebedev Physical Institute, Russian Academy of Sciences

Email: degtyarenkopn@gmail.com
119991, Moscow, Russia

O. A. Sobolevskiy

Lebedev Physical Institute, Russian Academy of Sciences

Email: degtyarenkopn@gmail.com
119991, Moscow, Russia

A. Yu. Tsvetkov

Lebedev Physical Institute, Russian Academy of Sciences

Email: degtyarenkopn@gmail.com
119991, Moscow, Russia

B. I. Massalimov

Lebedev Physical Institute, Russian Academy of Sciences

Author for correspondence.
Email: degtyarenkopn@gmail.com
119991, Moscow, Russia

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