TY - JOUR
T1 - Direct Measurements of Field-Dependent Ordering in a Low-Field Vortex Glass State
AU - Wells, Frederick S.
AU - Pan, Alexey V.
AU - Wang, X. Renshaw
AU - Golovchanskiy, Igor A.
AU - Fedoseev, Sergey A.
AU - Hilgenkamp, Hans
AU - Rozenfeld, Anatoly
PY - 2016/4/1
Y1 - 2016/4/1
N2 - 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.
AB - 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.
KW - Flux pinning
KW - Scanning probe microscopy
KW - Superconducting thin films
KW - Yttrium barium copper oxide
KW - 2023 OA procedure
UR - http://www.scopus.com/inward/record.url?scp=84963799152&partnerID=8YFLogxK
U2 - 10.1109/TASC.2016.2533570
DO - 10.1109/TASC.2016.2533570
M3 - Article
AN - SCOPUS:84963799152
SN - 1051-8223
VL - 26
JO - IEEE transactions on applied superconductivity
JF - IEEE transactions on applied superconductivity
IS - 3
M1 - 8000905
ER -