Summary
This paper reports comprehensive characterisation of Bi-2212 superconducting wire samples drawn from 10 billets, measuring critical current density across high magnetic fields and variable temperatures. Using both transport measurements and magnetometer techniques, the authors found that vortex pinning properties remained remarkably stable across wires despite wide variation in final JC performance, suggesting that predictive modelling of JC(B) behaviour may be feasible for magnet technology applications. The work contributes to standardisation of Bi-2212 wire assessment as the material transitions from research development to practical engineering deployment.
Key measures
Critical current density JC at 15 T and 4.2 K (ranging 1210–6560 A/mm²); measurements at fields up to 31 T; irreversibility field (Birr) at 20 K via vibrating sample magnetometer; vortex pinning properties
Outcomes reported
The study characterised critical current density (JC) behaviour of Bi-2212 superconducting wires across multiple billets and high magnetic fields (up to 31 T), examining vortex pinning properties and irreversibility fields. Results indicated stable vortex pinning properties across wires despite significant variation in final JC performance.
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