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

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)

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.

Original languageEnglish
Article number8000905
JournalIEEE transactions on applied superconductivity
Volume26
Issue number3
DOIs
Publication statusPublished - 1 Apr 2016

Keywords

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

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