| Issue |
Europhys. Lett.
Volume 53, Number 5, March 2001
|
|
|---|---|---|
| Page(s) | 646 - 652 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00606-0 | |
| Published online | 01 December 2003 | |
Asymmetric flux pinning in laterally nanostructured ferromagnetic/superconducting bilayers
1
Laboratorium voor Vaste-Stoffysica en Magnetisme, K.U. Leuven
Celestijnenlaan 200D, B-3001 Leuven, Belgium
2
2. Physikalisches Institut, RWTH Aachen - D-52056 Aachen, Germany
Corresponding author: Martin.Lange@fys.kuleuven.ac.be
Received:
2
October
2000
Accepted:
19
December
2000
We investigated the pinning of flux lines in a superconducting film by a regular array of magnetic antidots. The sample consists of a Co/Pt multilayer with perpendicular magnetic anisotropy in which a regular pattern of submicron holes is introduced and which is covered by a type-II superconducting Pb film. The resulting ferromagnetic/superconducting heterostructure shows a pronounced asymmetric magnetization curve with respect to the field polarity. This asymmetry clearly demonstrates that the magnetic contribution dominates the pinning potential imposed by the magnetic antidots on the superconducting film.
PACS: 74.60.Ge – Flux pinning, flux creep, and flux-line lattice dynamics / 74.80.Dm – Superconducting layer structures: superlattices, heterojunctions, and multilayers / 75.70.-i – Magnetic films and multilayers
© EDP Sciences, 2001
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