Volume 54, Number 5, June 2001
|Page(s)||682 - 687|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 December 2003|
Visualization of novel flux dynamics in thin films with antidots
Division of Physics and Astronomy, Faculty of
Sciences, Vrije Universiteit De Boelelaan
1081, 1081 HV Amsterdam, The Netherlands
2 Institut für Schicht- und Ionentechnik (ISI) - Forschungszentrum Jülich, Germany
Accepted: 19 March 2001
Using magneto-optical visualization, individual 2 diameter antidots (circular holes) in thin films are clearly observed. These antidots are found to act at low temperature as very strong pinning centres. Flux penetration takes place along the lattice vectors of the antidot lattice. Both commensurate and incommensurate channels are observed as well as hopping between channels, in agreement with numerical simulations. Surprisingly, even for these large ( antidots the trapped flux is in agreement with previous theoretical work for small ( antidots.
PACS: 74.60.Ge – Flux pinning, flux creep, and flux-line lattice dynamics / 74.80.-g – Spatially inhomogeneous structures / 74.76.Bz – High- films
© EDP Sciences, 2001
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