Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Superconductivity for HTS GdBCO CC with heat treatment

  • You, Jong Su (Div. of Sci. Education and Institute of Sci. Education, Jeonbuk National University) ;
  • Yang, Jeong Hun (Div. of Sci. Education and Institute of Sci. Education, Jeonbuk National University) ;
  • Song, Kyu Jeong (Div. of Sci. Education and Institute of Sci. Education, Jeonbuk National University)
  • Received : 2021.02.24
  • Accepted : 2021.03.29
  • Published : 2021.03.31
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Abstract

The magnetic properties of heat treated O-series high temperature superconducting (HTS) GdBCO coated conductor (CC) tapes which were formed of Ag/GdBCO/Buffer-layers/Stainless Steel (SS), were investigated by employing a Quantum Design PPMS-14. Using a modified Bean model, the critical current density Jc values have been estimated from the 𝚫mirr(H) data, which are obtained by measuring the magnetic moment m(H) loops. For a range of intermediate fields, which are interacting or collective flux pinning area, the magnetic flux behaviors were investigated from the relationship Jc ∝ H-β. In addition, the changes of irreversibility magnetic field Hirr line of heat-treated O-series HTS GdBCO CC tapes were analyzed, according as the annealing temperature under oxygen flowing increases. Both weak and strong break-downs were found by examining the changes of irreversibility magnetic field Hirr lines.

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References

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