Doubling the Critical Current Density of High Temperature Superconducting Coated Conductors through Proton Irradiation

Abstract

The in-field critical current of commercial YBa2Cu3O7 coated conductors can be substantially enhanced by post-fabrication irradiation with 4 MeV protons. Irradiation to a fluence of 8x10^16 p/cm^2 induces a near doubling of the critical current in fields of 6 T || c at a temperature of 27 K, a field and temperature range of interest for applications such as rotating machinery. A mixed pinning landscape of preexisting precipitates and twin boundaries and small, finely dispersed irradiation induced defects may account for the improved vortex pinning in high magnetic fields. Our data indicate that there is significant head-room for further enhancements.

19 pages, 4 figures

References in corpus (3)

• Strong Pinning in High Temperature Superconductors
• Theory and simulations on strong pinning of vortex lines by nanoparticles
• Doping and Irradiation Controlled Vortex Pinning Behavior in BaFe2(As1-xPx)2 Single Crystals

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