Title: Pinning properties and vortex dynamics in thin superconducting films with ferromagnetic and antiferromagnetic arrays of magnetic dots
Authors: Chen, QH ×
Teniers, G
Jin, Biao-Bing
Moshchalkov, Victor #
Issue Date: Jan-2006
Publisher: Published by the American Physical Society through the American Institute of Physics
Series Title: Physical Review B, Condensed Matter and Materials Physics vol:73 issue:1 pages:1-8
Conference: date:Katholieke Univ Leuven, Div Solid State Phys & Magnetism, Nanoscale Superconduct & Magnetism Grp, B-3001 Louvain, Belgium
Article number: 014506
Abstract: We report on the simulations of the pinning properties and vortex dynamics in thin superconducting film with three different periodic arrays of magnetic dots: (1) all magnetic dots have the same magnetization orientation (ferromagnetic pinning array); (2) magnetic dots with up and down magnetization orientation are arranged alternatively, to form an antiferromagnetic two-dimensional array; and (3) the same as the previous array, but each dot is replaced by a 2x2 magnetic dot subarray. All dots in the subarray have the same magnetization orientation. We calculated the critical depinning force and magnetization as a function of the applied magnetic field for these three arrays. Due to the field polarity-dependent flux pinning effect of the magnetic dots, asymmetric pinning behavior in the first array can be switched to the symmetric one in the latter two arrays while keeping the pronounced matching effects. We also calculated the current-voltage characteristics at both commensurate and incommensurate fields. We found that at the first matching field, the transition from the pinned phase to a vortex motion phase is continuous for the ferromagnetic configuration but discontinuous for the two antiferromagnetic configurations. This can be explained by different vortex dynamical trajectories. Our results indicate that pinning properties and vortex dynamics in thin superconducting films can be manipulated by tuning the configuration of the magnetic dot array.
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

Files in This Item:

There are no files associated with this item.

Request a copy


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science