3-D properties in (RE)BCO tapes measured in fields up to 35T

Andrew P. Smith, Mark J. Raine, Elizabeth Surrey, Satoshi Awaji, Tatsunori Okada, Damian P. Hampshire

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We have measured the temperature and angular dependence of the upper critical field (BC2) 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 BC2(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.

Original languageEnglish
Article number6601005
JournalIEEE Transactions on Applied Superconductivity
Volume29
Issue number5
DOIs
Publication statusPublished - 2019 Aug

Keywords

  • 2G HTS Conductors
  • critical temperature and critical fields
  • cuprates
  • magnetic anisotropy
  • magnetic field measurement
  • magnetic susceptibility
  • superconducting materials measurements

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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