VLASKO-VLASOV, V. K.; COLAUTO, F.; BUZDIN, Alexandre I.; ROSENMANN, D.; BENSEMAN, T.; KWOK, W.-K.

doi:10.1103/PhysRevB.95.144504

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VLASKO-VLASOV, V. K.
Material Science Division [ANL] [MSD]

COLAUTO, F.
Universidade Federal de São Carlos [São Carlos] [UFSCar]

BUZDIN, Alexandre I.
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

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Ce document a été publié dans

Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2017, vol. 95, n° 14, p. 144504

American Physical Society

Résumé en anglais

We image the motion of superconducting vortices in niobium film covered with a regular array of thin permalloy strips. By altering the magnetization orientation in the strips using a small in-plane magnetic field, we can tune the strength of interactions between vortices and the strip edges, enabling acceleration or retardation of the superconducting vortices in the sample and consequently introducing strong tunable anisotropy into the vortex dynamics. We discuss our observations in terms of the attraction/repulsion between point magnetic charges carried by vortices and lines of magnetic charges at the strip edges and derive analytical formulas for the vortex-magnetic strips coupling. Our approach demonstrates the analogy between the vortex motion regulated by the magnetic strip array and electric carrier flow in gated semiconducting devices. Scaling down the geometrical features of the proposed design may enable controlled manipulation of single vortices, paving the way for Abrikosov vortex microcircuits and memories.< Réduire

DOI

http://dx.doi.org/10.1103/PhysRevB.95.144504

Project ANR

Control de courants supraconducteurs via des effets de spin et de champ: fondements pour une électronique non conventionnelle - ANR-15-CE24-0008

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Importé de hal

Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798