Multilayering BZO nanocolumns with different defect densities for YBCO high field applications

The multilayer structures of alternating superconducting YBCO films doped with different BZO nanocolumn densities were utilized. We show that using 50 nm thick layers increases J (c) in the whole angular range by maximum 40% as compared with 200 nm single layer BZO-doped or multilayers with smaller thickness. Multilayering is found to be most effective at high magnetic fields and temperatures. These results indicate that demonstrated multilayer structures are extremely attractive for various electrical power applications in the foreseeable future. The experimental outcomes are thoroughly discussed with the mechanisms of crystalline quality and flux pinning in YBCO with different BZO nanorod densities multilayers of varying thicknesses.

Automated summary

The use of 50nm thick layers in multilayer structures increases J(c) by up to 40% compared to single layer BZO-doped films, with the best performance observed at high magnetic fields and temperatures, making them attractive for various electrical power applications in the future.