Journal
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
Volume 31, Issue 5, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TASC.2021.3068915
Keywords
Critical current density and flux pinning; microstructure; nanostructured materials; type II superconductors
Funding
- Project NATO SPS [G5773]
- National Academy of Sciences of Ukraine Projects [III-11-21(0781)]
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The critical current and pinning forces in MgB2 are most influenced by impurity oxygen distribution, higher borides inclusions, and carbon doping, whereas twin density and density of Y211 inclusions are relevant in MT-YBCO.
The correlations between structural features, critical current density and pinning landscape of YBa2Cu3O7-delta and MgB2-based materials produced in the forms of bulk melt-textured (MT-YBCO) and polycrystalline (MgB2) blocks and wires with excellent superconducting characteristics were revealed. The impurity oxygen distribution, higher borides inclusions and carbon doping are most important tier the critical currents and pinning forces in MgB2, while the twin density and the density of Y211 inclusions are relevant in MT-YBCO.
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