3D Properties in (RE)BCO Tapes measured in Fields up to 35 T

Smith, AP; Raine, MJ; Surrey, E; Awaji, S; Okada, T; Hampshire, DP

doi:10.1109/tasc.2019.2895218

3D Properties in (RE)BCO Tapes measured in Fields up to 35 T

Smith, AP; Raine, MJ; Surrey, E; Awaji, S; Okada, T; Hampshire, DP

Authors

AP Smith

Dr Mark Raine m.j.raine@durham.ac.uk
Chief Experimental Officer

E Surrey

S Awaji

T Okada

DP Hampshire

Abstract

We have measured the temperature and angular dependence of the upper critical field (BC 2 ) for three state of the art (RE)BCO HTS tapes using variable-temperature ac susceptibility measurements in applied fields up to 35 T. The three tapes measured were a Fujikura tape without artificial pinning centers and Superpower tapes with and without artificial pinning centers. We have obtained fits to our BC 2 (T,θ) data using both the anisotropic Ginzburg–Landau (G–L) and Klemm’s models for layered superconductors. Our calculations suggest that these tapes are three-dimensional (3-D) at all temperatures in zero field but become 2-D in magnetic fields above a crossover field of 457/γ T, where γ = √mc/mab is the G–L anisotropy parameter. The values of γ were measured and show that the 3-D–2-D crossover fields in these tapes are at least 130 T.

Citation

Smith, A., Raine, M., Surrey, E., Awaji, S., Okada, T., & Hampshire, D. (2019). 3D Properties in (RE)BCO Tapes measured in Fields up to 35 T. IEEE Transactions on Applied Superconductivity, 29(5), Article 6601005. https://doi.org/10.1109/tasc.2019.2895218

Journal Article Type	Article
Acceptance Date	Jan 8, 2019
Online Publication Date	Mar 11, 2019
Publication Date	Aug 31, 2019
Deposit Date	Jan 18, 2019
Publicly Available Date	Mar 28, 2019
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	6601005
DOI	https://doi.org/10.1109/tasc.2019.2895218

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