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Visualizing the mechanism that determines the critical current density in polycrystalline superconductors using time-dependent Ginzburg-Landau theory

Carty, GJ; Hampshire, DP

Visualizing the mechanism that determines the critical current density in polycrystalline superconductors using time-dependent Ginzburg-Landau theory Thumbnail


Authors

GJ Carty



Abstract

In polycrystalline superconducting materials optimized for high critical current density (JC) in high magnetic fields, the mechanism that determines JC has long remained uncertain because of the complicated manner in which the fluxon-fluxon and fluxon-microstructure forces combine. In this work, the time-dependent Ginzburg-Landau equations are used to produce visualizations of fluxons at JC that show the disorder in the pinned part of the flux-line lattice and the motion of those fluxons along grain boundaries that cause dissipation. Calculated values of JC are consistent with experimental data.

Citation

Carty, G., & Hampshire, D. (2008). Visualizing the mechanism that determines the critical current density in polycrystalline superconductors using time-dependent Ginzburg-Landau theory. Physical review B, 77(17), Article 172501. https://doi.org/10.1103/physrevb.77.172501

Journal Article Type Article
Publication Date May 1, 2008
Deposit Date Jun 30, 2011
Publicly Available Date Jul 12, 2011
Journal Physical Review B
Print ISSN 1098-0121
Electronic ISSN 1550-235X
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 77
Issue 17
Article Number 172501
DOI https://doi.org/10.1103/physrevb.77.172501

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Copyright Statement
© 2008 The American Physical Society





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