Title: Dynamic regimes in films with a periodic array of antidots
Authors: Silhanek, Alejandro ×
Raedts, Sophie
Van Bael, Margriet
Moshchalkov, Victor #
Issue Date: Jan-2004
Publisher: Springer-Verlag Heidelberg
Series Title: European Physical Journal B, Condensed Matter Physics vol:37 issue:1 pages:19-24
Abstract: We have studied the dynamic response of Pb thin films with a square array of antidots by means of ac susceptibility chi(T,H) measurements. At low enough ac drive amplitudes h, vortices moving inside the pinning potential give rise to a frequency- and h-independent response together with a scarce dissipation. For higher amplitudes, the average distance travelled by vortices surpasses the pinning range and a critical state develops. We found that the boundary h*(H,T) between these regimes smoothly decreases as T increases whereas a step-like behavior is observed as a function of field. We demonstrate that these steps in h*(H) arise from sharp changes in the pinning strength corresponding to different vortex configurations. For a wide set of data at several fields and temperatures in the critical state regime, we show that the scaling laws based on the simple Bean model are satisfied.
ISSN: 1434-6028
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
Tutorial services, Faculty of Science
× corresponding author
# (joint) last author

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