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An all-field-range description of the critical current density in superconducting YBCO films

Journal Article


Abstract


  • A new critical current density (Jc) model for high-quality YBCO (YBa2Cu3O7) thin films has

    been proposed, combining thermally activated flux creep with a vortex pinning potential for

    columnar defects. The pinning for thermally activated vortices has been described as strong

    pinning on chains of individual edge dislocations that form low-angle domain boundaries in

    high-quality YBCO thin films. The model yields an adequate description of the Jc behaviour

    over the whole applied field range, as verified by direct measurements of Jc in YBCO thin films

    grown by pulsed-laser deposition. It also indicates that the effective pinning landscape changes

    under the influence of the external conditions. Remarkably, the pinning potential obtained from

    the model is consistent with the values obtained for columnar defects, which confirms the

    validity of the overall approach.

UOW Authors


  •   Golovchanskiy, Igor A. (external author)
  •   Pan, Alexey
  •   Shcherbakova, Olga V. (external author)
  •   Fedoseev, Sergey (external author)
  •   Dou, Shi

Publication Date


  • 2011

Citation


  • Golovchanskiy, I. V., Pan, A. V., Shcherbakova, O. V., Fedoseev, S. & Dou, S. Xue. (2011). An all-field-range description of the critical current density in superconducting YBCO films. Superconductor Science and Technology, 24 (10), 105020-105024.

Scopus Eid


  • 2-s2.0-80053153627

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/4107

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 105020

End Page


  • 105024

Volume


  • 24

Issue


  • 10

Place Of Publication


  • United Kingdom

Abstract


  • A new critical current density (Jc) model for high-quality YBCO (YBa2Cu3O7) thin films has

    been proposed, combining thermally activated flux creep with a vortex pinning potential for

    columnar defects. The pinning for thermally activated vortices has been described as strong

    pinning on chains of individual edge dislocations that form low-angle domain boundaries in

    high-quality YBCO thin films. The model yields an adequate description of the Jc behaviour

    over the whole applied field range, as verified by direct measurements of Jc in YBCO thin films

    grown by pulsed-laser deposition. It also indicates that the effective pinning landscape changes

    under the influence of the external conditions. Remarkably, the pinning potential obtained from

    the model is consistent with the values obtained for columnar defects, which confirms the

    validity of the overall approach.

UOW Authors


  •   Golovchanskiy, Igor A. (external author)
  •   Pan, Alexey
  •   Shcherbakova, Olga V. (external author)
  •   Fedoseev, Sergey (external author)
  •   Dou, Shi

Publication Date


  • 2011

Citation


  • Golovchanskiy, I. V., Pan, A. V., Shcherbakova, O. V., Fedoseev, S. & Dou, S. Xue. (2011). An all-field-range description of the critical current density in superconducting YBCO films. Superconductor Science and Technology, 24 (10), 105020-105024.

Scopus Eid


  • 2-s2.0-80053153627

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/4107

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 105020

End Page


  • 105024

Volume


  • 24

Issue


  • 10

Place Of Publication


  • United Kingdom