Comparison of Commercial REBCO Tapes Through Flux Pinning Energy
Masood Rauf Khan,
Antonio Leo,
Andrea Masi,
Achille Angrisani Armenio,
Andrea Augieri,
Giuseppe Celentano,
Armando Galluzzi,
Massimiliano Polichetti,
Angela Nigro,
Gaia Grimaldi
Affiliations
Masood Rauf Khan
National Research Council Institute for SuPerconductors, INnovative Materials, and Devices, CNR-SPIN, c/o, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
Antonio Leo
National Research Council Institute for SuPerconductors, INnovative Materials, and Devices, CNR-SPIN, c/o, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
Andrea Masi
ENEA—Italian National Agency for New Technologies, Energy and Sustainable Economic Development, C.R. Frascati, 00044 Frascati, Italy
Achille Angrisani Armenio
ENEA—Italian National Agency for New Technologies, Energy and Sustainable Economic Development, C.R. Frascati, 00044 Frascati, Italy
Andrea Augieri
ENEA—Italian National Agency for New Technologies, Energy and Sustainable Economic Development, C.R. Frascati, 00044 Frascati, Italy
Giuseppe Celentano
ENEA—Italian National Agency for New Technologies, Energy and Sustainable Economic Development, C.R. Frascati, 00044 Frascati, Italy
Armando Galluzzi
Physics Department ‘E. R. Caianiello’, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
Massimiliano Polichetti
Physics Department ‘E. R. Caianiello’, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
Angela Nigro
Physics Department ‘E. R. Caianiello’, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
Gaia Grimaldi
National Research Council Institute for SuPerconductors, INnovative Materials, and Devices, CNR-SPIN, c/o, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
This work presents a comparison of different commercial tapes belonging to the second-generation High-Temperature Superconductors (2G HTS) produced by SuNAM Co., Ltd., SuperOx, and Shanghai Superconductors Technology Co., Ltd. (SST) companies. The aim is to investigate pinning mechanisms responsible for best performances, looking at the anisotropy of the irreversibility field and of the flux pinning energy. The irreversibility line states the upper limit of current-carrying capacity, whereas the flux pinning energy explores the ability of material defects to act as weak collectively or strong single vortex pinning centers. All investigated samples have artificial pinning centers (APCs) included in the superconducting matrix: BHO-doped EuBCO for SST, Y2O3 in YBCO for SuperOx, and Gd2O3 particles trapped in GdBCO for SuNAM. Resistive transition curves were measured in high magnetic fields up to 16 T for magnetic field orientations parallel and perpendicular to the tape surface. We found that the anistropy of SST tape shows an overall independence both on temperature and magnetic field, while the other two samples show a more complex behavior. This leads to the conclusion that properly engineered APC optimization in coated conductors can further reduce anisotropy of superconducting properties.
