High-performance high-TC superconducting wires

Area of Science:

• Materials Science
• Condensed Matter Physics
• Superconductivity

Background:

• High-temperature superconducting (HTS) materials offer significant potential for large-scale applications.
• Achieving high critical current density (Jc) in applied magnetic fields remains a key challenge for HTS wires.

Purpose of the Study:

• To develop and characterize superconducting wire segments meeting performance requirements for demanding applications.
• To enhance the critical current and magnetic field performance of YBa2Cu3O(7-delta) films.

Main Methods:

• Epitaxial growth of 3-micrometer-thick YBa2Cu3O(7-delta) films on rolling assisted biaxially textured substrates using pulsed laser ablation.
• Incorporation of periodic arrays of columnar defects (self-aligned nanodots) throughout the film thickness.

Main Results:

• The fabricated YBa2Cu3O(7-delta) films demonstrated critical current densities meeting or exceeding application requirements.
• Significant enhancements in critical current were observed in self-field, with excellent current retention in high applied magnetic fields.
• Columnar defects effectively pinned superconducting vortices, leading to substantially improved wire performance.

Conclusions:

• The developed superconducting wire segments show great promise for large-scale applications requiring high performance in magnetic fields.
• The strategy of incorporating columnar defects is effective for enhancing the critical current density and magnetic field resilience of HTS wires.