Alexander Blair
Modeling the Critical Current of Polycrystalline Superconducting Films in High Magnetic Fields
Blair, Alexander; Hampshire, Damian
Authors
Damian Hampshire
Abstract
We have performed simulations using time-dependent Ginzburg–Landau theory on a two-dimensional (2-D) polycrystalline system, where grain boundaries are modeled as narrow regions with a locally reduced critical temperature ( T c ). For the small system sizes investigated, we find that the critical current density ( J c ) is not sensitive to changes in grain size until the grain size is sufficiently small that it limits the average superparticle density in the system through the proximity effect. Furthermore, once T c in the boundary regions is sufficiently low relative to the surrounding superconductor that grain boundary regions act as preferred channels for flux flow, further reductions in the boundary T c only weakly reduce J c across the superconductor.
Citation
Blair, A., & Hampshire, D. (2019). Modeling the Critical Current of Polycrystalline Superconducting Films in High Magnetic Fields. IEEE Transactions on Applied Superconductivity, 29(5), Article 8001705. https://doi.org/10.1109/tasc.2019.2895213
Journal Article Type | Article |
---|---|
Acceptance Date | Jan 9, 2019 |
Online Publication Date | Jan 24, 2019 |
Publication Date | Aug 31, 2019 |
Deposit Date | Mar 1, 2019 |
Publicly Available Date | Mar 28, 2024 |
Journal | IEEE Transactions on Applied Superconductivity |
Print ISSN | 1051-8223 |
Electronic ISSN | 1558-2515 |
Publisher | Institute of Electrical and Electronics Engineers |
Peer Reviewed | Peer Reviewed |
Volume | 29 |
Issue | 5 |
Article Number | 8001705 |
DOI | https://doi.org/10.1109/tasc.2019.2895213 |
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