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In situ hydrostatic pressure induced improvement of critical current density and suppression of magnetic relaxation in Y(Dy-0.5)Ba2Cu3O7-(delta) coated conductors

Journal Article


Abstract


  • We report on the effect of in situ hydrostatic pressure on the enhancement of the in-magneticfield

    critical current density parallel to the crystallographic c-axis and vortex pinning in epitaxial

    Y(Dy0.5)Ba2Cu3O7−δ coated conductors prepared by metal organic deposition. Our results show

    that in situ hydrostatic pressure greatly enhances the critical current density at high fields and

    high temperatures. At 80 K and 5 T we observe a ten-fold increase in the critical current density

    under the pressure of 1.2 GPa, and the irreversibility line is shifted to higher fields without

    changing the critical temperature. The normalized magnetic relaxation rate shows that vortex

    creep rates are strongly suppressed due to applied pressure, and the pinning energy is

    significantly increased based on the collective creep theory. After releasing the pressure, we

    recover the original superconducting properties. Therefore, we speculate that the in situ

    hydrostatic pressure exerted on the coated conductor enhances the pinning of existing extended

    defects. This is totally different from what has been observed in REBa2Cu3O7−δ melt-textured

    crystals, where the effect of pressure generates point-like defects.

Authors


  •   Sang, Lina (external author)
  •   Gutierrez Royo, Joffre (external author)
  •   Cai, Chuanbing (external author)
  •   Dou, Shi Xue
  •   Wang, Xiaolin

Publication Date


  • 2018

Citation


  • Sang, L., Gutierrez , J., Cai, C., Dou, S. & Wang, X. (2018). In situ hydrostatic pressure induced improvement of critical current density and suppression of magnetic relaxation in Y(Dy-0.5)Ba2Cu3O7-(delta) coated conductors. Superconductor Science & Technology, 31 (7), 075003-1-075003-7.

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3142

Start Page


  • 075003-1

End Page


  • 075003-7

Volume


  • 31

Issue


  • 7

Place Of Publication


  • United Kingdom

Abstract


  • We report on the effect of in situ hydrostatic pressure on the enhancement of the in-magneticfield

    critical current density parallel to the crystallographic c-axis and vortex pinning in epitaxial

    Y(Dy0.5)Ba2Cu3O7−δ coated conductors prepared by metal organic deposition. Our results show

    that in situ hydrostatic pressure greatly enhances the critical current density at high fields and

    high temperatures. At 80 K and 5 T we observe a ten-fold increase in the critical current density

    under the pressure of 1.2 GPa, and the irreversibility line is shifted to higher fields without

    changing the critical temperature. The normalized magnetic relaxation rate shows that vortex

    creep rates are strongly suppressed due to applied pressure, and the pinning energy is

    significantly increased based on the collective creep theory. After releasing the pressure, we

    recover the original superconducting properties. Therefore, we speculate that the in situ

    hydrostatic pressure exerted on the coated conductor enhances the pinning of existing extended

    defects. This is totally different from what has been observed in REBa2Cu3O7−δ melt-textured

    crystals, where the effect of pressure generates point-like defects.

Authors


  •   Sang, Lina (external author)
  •   Gutierrez Royo, Joffre (external author)
  •   Cai, Chuanbing (external author)
  •   Dou, Shi Xue
  •   Wang, Xiaolin

Publication Date


  • 2018

Citation


  • Sang, L., Gutierrez , J., Cai, C., Dou, S. & Wang, X. (2018). In situ hydrostatic pressure induced improvement of critical current density and suppression of magnetic relaxation in Y(Dy-0.5)Ba2Cu3O7-(delta) coated conductors. Superconductor Science & Technology, 31 (7), 075003-1-075003-7.

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3142

Start Page


  • 075003-1

End Page


  • 075003-7

Volume


  • 31

Issue


  • 7

Place Of Publication


  • United Kingdom