BESPALOV, A. A.; MEL'NIKOV, A. S.; BUZDIN, Alexandre I.

doi:10.1016/j.physc.2014.04.046

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BESPALOV, A. A.
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Institute for Physics of Microstructures of the RAS

MEL'NIKOV, A. S.
Institute for Physics of Microstructures of the RAS
Nizhny Novgorod State University

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

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Article de revue

Ce document a été publié dans

Physica C: Superconductivity and its Applications. 2014-08-15, vol. 503, p. 98-100

Elsevier

Résumé en anglais

In magnetic superconductors the magnetic flux dynamics is influenced by the interaction of vortices with the magnetization. This interaction leads to the appearance of an additional damping force acting on the vortices. By solving the London and Landau-Lifshitz-Gilbert equations we analyze the ac and dc responses of a ferromagnetic superconductor in the mixed state. If the vortices are driven by an ac force, their viscosity is enhanced due to the generation of magnons. This viscosity enhancement affects the surface impedance of the sample. In the case of a dc driving current vortices start to radiate magnons when their velocity exceeds a threshold value. As a result, either a step-like feature or a series of peaks appear on the I-V curve.< Réduire

Mots clés en anglais

Ferromagnetic superconductors

Surface impedance

Vortex dynamics

DOI

http://dx.doi.org/10.1016/j.physc.2014.04.046

Projet Européen

New Century of Superconductivity: Ideas, Materials, Technologies

Project ANR

Des nanosondes ultra-sensibles pour explorer les distributions de charges électriques dans les supraconducteurs - ANR-12-BS10-0014

Origine

Importé de hal

Unités de recherche

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