Direct Measurements of Field-Dependent Ordering in a Low-Field Vortex Glass State

Frederick S. Wells, Alexey V. Pan, X. Renshaw Wang, Igor A. Golovchanskiy, Sergey A. Fedoseev, Hans Hilgenkamp, Anatoly Rozenfeld

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2 Citations (Scopus)


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.

Original languageEnglish
Article number8000905
JournalIEEE transactions on applied superconductivity
Issue number3
Publication statusPublished - 1 Apr 2016


  • Flux pinning
  • scanning probe microscopy
  • superconducting thin films
  • yttrium barium copper oxide


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