A1 Refereed original research article in a scientific journal
Roles of electron mean free path and flux pinning in optimizing the critical current in YBCO superconductors
Authors: Paturi Petriina, Huhtinen Hannu
Publisher: IOP Publishing Ltd
Publication year: 2022
Journal: Superconductor Science and Technology
Journal name in source: SUPERCONDUCTOR SCIENCE & TECHNOLOGY
Journal acronym: SUPERCOND SCI TECH
Article number: 065007
Volume: 35
Issue: 6
Number of pages: 9
ISSN: 0953-2048
DOI: https://doi.org/10.1088/1361-6668/ac68a5
Web address : https://iopscience.iop.org/article/10.1088/1361-6668/ac68a5
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/175159420
We present a way to reach the maximum possible critical current density, J(c), for YBa2Cu3O6+x (YBCO) thin films. This value is found to be around ten times the currently reached values. It is found that the J(c)(0 T) is governed by the mean free path of the electrons, as is the critical temperature, T-c. The J(c) in field, on the other hand, is governed by flux pinning sites and can be enhanced by optimizing the size and distribution of the non-superconducting nanoinclusions. By optimizing both the mean free path and the pinning structure, the maximum values can be reached.
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