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

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
• Public URL: https://durham-repository.worktribe.com/output/1309906