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Direct measurements of field-dependent ordering in a low-field vortex glass state

Journal Article


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Abstract


  • The variation of topological defect density and hexatic order parameter were measured over a range of micro-Tesla fields in a 2-D superconducting vortex glass. This was achieved through scanning SQUID microscopy of the vortex distribution in YBa2Cu3O7−δ thin films under field-cooled conditions. It was discovered that, although the defect density decreased for increasing magnetic fields, giving the impression of a more lattice-like vortex distribution, the hexatic order parameter also decreased, showing that the distribution was less orientationally ordered.

Authors


  •   Wells, Frederick (external author)
  •   Pan, Alexey
  •   Wang, X Renshaw. (external author)
  •   Golovchanskiy, Igor A. (external author)
  •   Fedoseev, Sergey (external author)
  •   Hilgenkamp, Hans (external author)
  •   Rosenfeld, Anatoly B.

Publication Date


  • 2016

Citation


  • Wells, F. S., Pan, A. V., Wang, X. Renshaw., Golovchanskiy, I. A., Fedoseev, S. A., Hilgenkamp, H. & Rozenfeld, A. (2016). Direct measurements of field-dependent ordering in a low-field vortex glass state. IEEE Transactions on Applied Superconductivity, 26 (3), 8000905-1-8000905-5.

Scopus Eid


  • 2-s2.0-84963799152

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2934&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1932

Start Page


  • 8000905-1

End Page


  • 8000905-5

Volume


  • 26

Issue


  • 3

Abstract


  • The variation of topological defect density and hexatic order parameter were measured over a range of micro-Tesla fields in a 2-D superconducting vortex glass. This was achieved through scanning SQUID microscopy of the vortex distribution in YBa2Cu3O7−δ thin films under field-cooled conditions. It was discovered that, although the defect density decreased for increasing magnetic fields, giving the impression of a more lattice-like vortex distribution, the hexatic order parameter also decreased, showing that the distribution was less orientationally ordered.

Authors


  •   Wells, Frederick (external author)
  •   Pan, Alexey
  •   Wang, X Renshaw. (external author)
  •   Golovchanskiy, Igor A. (external author)
  •   Fedoseev, Sergey (external author)
  •   Hilgenkamp, Hans (external author)
  •   Rosenfeld, Anatoly B.

Publication Date


  • 2016

Citation


  • Wells, F. S., Pan, A. V., Wang, X. Renshaw., Golovchanskiy, I. A., Fedoseev, S. A., Hilgenkamp, H. & Rozenfeld, A. (2016). Direct measurements of field-dependent ordering in a low-field vortex glass state. IEEE Transactions on Applied Superconductivity, 26 (3), 8000905-1-8000905-5.

Scopus Eid


  • 2-s2.0-84963799152

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2934&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1932

Start Page


  • 8000905-1

End Page


  • 8000905-5

Volume


  • 26

Issue


  • 3