Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Design of flux pinning property in REBCO coated conductors with artificial pinning centers

  • Matsushita, Teruo (Department of Computer Science and Electronics Kyushu Institute of Technology) ;
  • Kiuchi, Masaru (Department of Computer Science and Electronics Kyushu Institute of Technology)
  • Received : 2018.02.21
  • Accepted : 2018.03.04
  • Published : 2018.03.31
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Abstract

The improvement of critical current properties of $REBa_2Cu_3O_{7-x}$ (REBCO) coated conductors by introducing artificial pinning centers (APCs) is examined with respect to the field-angle anisotropy, high-field performance and relaxation property with time. Nano-rods along the c-axis introduced by PLD method and isotropic nano-particles introduced by TFA-MOD method are treated. The theoretical analysis is also shown to understand the effect of APCs quantitatively. The effects of superconducting layer thickness that influences the high-field performance and relaxation property are also discussed. It is shown that the upper critical field, which is another important factor to determine the high-field property, can be improved by introduction of APCs through electron scattering at interfaces with the superconducting matrix. The optimum critical current property can be obtained by properly designing the morphology and number density of APCs and the superconducting layer thickness.

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References

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