Smith, A.P. and Raine, M.J. and Surrey, E. and Awaji, S. and Okada, T. and Hampshire, D.P. (2019) '3D properties in (RE)BCO tapes measured in fields up to 35 T.', IEEE transactions on applied superconductivity., 29 (5). p. 6601005.
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.
|Full text:||(AM) Accepted Manuscript|
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|Publisher Web site:||https://doi.org/10.1109/TASC.2019.2895218|
|Publisher statement:||© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.|
|Date accepted:||08 January 2019|
|Date deposited:||28 March 2019|
|Date of first online publication:||11 March 2019|
|Date first made open access:||28 March 2019|
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