Study of Critical Current and n-Values of 2G HTS Tapes: Their Magnetic Field-Angular Dependence
Authors
Zhong, Z
Geng, J
Li, Li
Zhang, H
Dong, Q
Publication Date
2018-12Journal Title
Journal of Superconductivity and Novel Magnetism
ISSN
1557-1939
Publisher
Springer Science and Business Media LLC
Volume
31
Issue
12
Pages
3847-3854
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Zhang, X., Zhong, Z., Geng, J., Shen, B., Ma, J., Li, L., Zhang, H., et al. (2018). Study of Critical Current and n-Values of 2G HTS Tapes: Their Magnetic Field-Angular Dependence. Journal of Superconductivity and Novel Magnetism, 31 (12), 3847-3854. https://doi.org/10.1007/s10948-018-4678-8
Abstract
Since many applications of YBCO tapes operate in external magnetic fields, it is necessary to investigate the magneto-angular dependence of critical current and n-values in coated conductors. In this paper, five commercial YBCO tapes with different microstructures produced by three different manufacturers are chosen. The selected samples have width of 2.0, 4.0, 4.8, 6.0 or 12mm, with copper, brass or stainless steel laminations. The critical current density dependence Jc (B,θ) and n-values characteristics n(B,θ) of the tapes are comprehensively measured under various magnetic fields and orientations. Afterwards, the obtained experimental data sets are successfully fitted using a novel multi-objective model which considers the material anisotropy. By using this approach a fitting function Ic (B,θ) can always be obtained to accurately describe the experimental data, regardless of the fabrication and width differences of the superconducting tapes. Moreover, our experiment shows that when subject to different external magnetic fields, the angular dependence of n-values characteristics are directly correlated with the corresponding critical current profiles. Our results are helpful to predict the critical current of electromagnetically interacting 2G HTS wires and thereby improving the design and performance of the devices made from YBCO tapes.
Sponsorship
Engineering and Physical Sciences Research Council (EP/R042918/1)
Embargo Lift Date
2100-01-01
Identifiers
External DOI: https://doi.org/10.1007/s10948-018-4678-8
This record's URL: https://www.repository.cam.ac.uk/handle/1810/278304
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