Journal article
Vortex Confinement in Planar Superconductor/Ferromagnet Hybrid Structures
IEEE transactions on magnetics, v 48(11), pp 3275-3279
Nov 2012
Abstract
We use low temperature magnetic force microscopy and global magnetometry measurements to study the influence of magnetic domains on the Abrikosov vortex pinning in planar superconducting/ferromagnet bilayers. The superconducting/ferromagnet bilayers consist of a 200 nm superconducting Nb film covering a Permalloy film, with an insulating layer in between to avoid proximity effect. The periodic stripe domain in the Permalloy film produces a potential for directing vortex motion in the adjacent superconducting film. We observed an enhancement of vortex pinning by a factor of 3 that occurs in bilayers with a magnetic stripe domains w ≈ 500 nm, close to the superconducting critical temperature (T/T c = 0.9) . At lower temperatures, when T/T c = 0.6 the channeled vortex motion and the intrinsic pinning favor vortex avalanches.
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Details
- Title
- Vortex Confinement in Planar Superconductor/Ferromagnet Hybrid Structures
- Creators
- M Iavarone - Temple UniversityA Scarfato - University of SalernoF Bobba - University of SalernoM Longobardi - University of SalernoS. A Moore - Temple UniversityG Karapetrov - Drexel UniversityV Yefremenko - Argonne National LaboratoryV Novosad - Argonne National LaboratoryA. M Cucolo - University of SalernoArgonne National Lab. (ANL), Argonne, IL (United States)
- Publication Details
- IEEE transactions on magnetics, v 48(11), pp 3275-3279
- Publisher
- IEEE
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000310194400139
- Scopus ID
- 2-s2.0-84867781897
- Other Identifier
- 991019169697904721
InCites Highlights
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Engineering, Electrical & Electronic
- Physics, Applied