Title: Vortex configurations in a Pb/Cu microdot with a 2x2 antidot cluster
Authors: Puig, T ×
Rosseel, E
Van Look, Lieve
Van Bael, Margriet
Moshchalkov, Victor
Bruynseraede, Yvan
Jonckheere, R #
Issue Date: Sep-1998
Publisher: Published by the American Physical Society through the American Institute of Physics
Series Title: Physical Review B, Condensed Matter and Materials Physics vol:58 issue:9 pages:5744-5756
Abstract: We present a detailed study of the transport properties of a superconducting Pb/Cu microdot with a 2x2 antidot cluster. The superconducting-normal (SM) phase boundary, critical currents, and current-voltage characteristics of this structure have been measured. The S/N phase boundary as a function of field B [T-c(B)] reveals an oscillatory structure caused by the limited number of possible vortex configurations that can be realized in these small clusters of pinning centers (antidots). We have analyzed the stability of these configurations and discussed the possible dissipation mechanisms using the critical current [J(c)(B)] and voltage-current [V(I)] characteristics data. A comparison of the experimental data of T-c(B) and J(c)(B) with calculations in the London limit of the Ginzburg-Landau theory confirms that vortices can indeed be pinned by the antidots forming a cluster and that the ground-state configurations of the vortices are noticeably modified by sending current through the structure. The possibility of generating phase slips as well as motion of the vortices in the 2x2 antidot cluster will also be discussed.
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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