Title: Scanning Hall probe microscopy of vortex patterns in a superconducting microsquare
Authors: Nishio, Taichiro ×
Chen, Qinghua
Gillijns, Werner
De Keyser, Katrien
Vervaeke, Koen
Moshchalkov, Victor #
Issue Date: 23-Jan-2008
Publisher: Published by the American Physical Society through the American Institute of Physics
Series Title: Physical review. B, Condensed matter and materials physics vol:77 pages:1-4
Article number: 012502
Abstract: We present direct observation of vortices confined to a superconducting 4×4 µm2 square Pb film at 4.2 K with a high resolution scanning Hall probe microscope. Integrals of the magnetic field penetrating the square as a function of the applied field show that an applied-field dependence of vorticity L agrees with calculations based on the Ginzburg-Landau (GL) equation for a square sample geometry. From asymmetric field distribution of the confined magnetic flux, the locations of vortices on the square are inferred for vorticities L=1–5. The obtained vortex patterns are analogous with the calculations in the framework of the full GL equation for temperatures considerably lower than the superconducting transition temperature Tc.
ISSN: 1098-0121
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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