Abstract Body

The utilization of Magnesium diboride (MgB₂) superconducting wire has garnered considerable attention owing to its remarkable potential applications in the operating temperature of 10-20 K and the relatively uncomplicated manufacturing processes. Over the years since 2014, our research endeavors at Sam Dong Co., Ltd. have been dedicated to advancing the frontiers of superconducting technology[1]. In particular, we are focusing on enhancing its electrical performance, fabricating lengthy wire, and exploring diverse architectural configurations to meet the specific requirements. A recent notable advancement in our pursuit has been the consideration of pyrene as a carbon dopant, yielding substantial improvements in high-field electrical performance. This approach has led to a noteworthy enhancement in the critical current density of the carbon-doped wire, as compared to its undoped counterpart. Notably, at the operating temperature of 20 K and 5 T, the critical current density of the carbon-doped wire was quantified at an impressive 2 x 10³ A/cm², surpassing that of the undoped wire. This achievement proves the efficacy of carbon doping under magnetic field and its potential to elevate the practical utility of MgB₂ superconducting wire. We have also successfully attained wire uniformity within an extended long-piece conductor for potential users.

References

[1] J. H. Choi , D. G. Lee, J. H. Jeon, E. J. Lee, M. Maeda and S. Choi  J. Supercond. Novel Magn. 32. 1219. 2019

Acknowledgment

This research was supported by National R&D Program through the National Research Foundation of Korea(NRF) funded by Ministry of Science and ICT(2022M3I9A1076881).