Imaging of Strong Nanoscale Vortex Pinning in GdBaCuO High-Temperature Superconducting Tapes.

ABSTRACT: The high critical current density of second-generation high-temperature superconducting (2G-HTS) tapes is the result of the systematic optimisation of the pinning landscape for superconducting vortices through careful engineering of the size and density of defects and non-superconducting second phases. Here, we use scanning Hall probe microscopy to conduct a vortex-resolved study of commercial GdBaCuO tapes in low fields for the first time and complement this work with "local" magnetisation and transport measurements. Magnetic imaging reveals highly disordered vortex patterns reflecting the presence of strong pinning from a dense distribution of nanoscale Gd₂O₃ second_-phase inclusions in the superconducting film. However, we find that the measured vortex pr

SUBMITTER: Collomb D 

PROVIDER: S-EPMC8145501 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature