Cherenkov radiation of spin waves by ultra-fast moving magnetic flux quanta
dc.contributor.author | DOBROVOLSKIY, O.V. | |
dc.contributor.author | WANG, Q. | |
dc.contributor.author | VODOLAZOV, D.Yu. | |
dc.contributor.author | BUDINSKA, B. | |
dc.contributor.author | SACHSER, R. | |
dc.contributor.author | CHUMAK, A.V. | |
dc.contributor.author | HUTH, M. | |
hal.structure.identifier | Laboratoire Ondes et Matière d'Aquitaine [LOMA] | |
dc.contributor.author | BUZDIN, A.I. | |
dc.description.abstractEn | Despite theoretical predictions for a Cherenkov-type radiation of spin waves (magnons) by various propagating magnetic perturbations, fast-enough moving magnetic field stimuli have not been available so far. Here, we experimentally realize the Cherenkov radiation of spin waves in a Co-Fe magnonic conduit by fast-moving (>1 km/s) magnetic flux quanta (Abrikosov vortices) in an adjacent Nb-C superconducting strip. The radiation is evidenced by the microwave detection of spin waves propagating a distance of 2 micrometers from the superconductor and it is accompanied by a magnon Shapiro step in its current-voltage curve. The spin-wave excitation is unidirectional and monochromatic, with sub-40 nm wavelengths determined by the period of the vortex lattice. The phase-locking of the vortex lattice with the excited spin wave limits the vortex velocity and reduces the dissipation in the superconductor. | |
dc.language.iso | en | |
dc.title.en | Cherenkov radiation of spin waves by ultra-fast moving magnetic flux quanta | |
dc.type | Document de travail - Pré-publication | |
dc.subject.hal | Physique [physics]/Physique [physics]/Physique Générale [physics.gen-ph] | |
dc.identifier.arxiv | 2103.10156 | |
hal.identifier | hal-03191158 | |
hal.version | 1 | |
hal.audience | Internationale | |
hal.origin.link | https://hal.archives-ouvertes.fr//hal-03191158v1 | |
bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.au=DOBROVOLSKIY,%20O.V.&WANG,%20Q.&VODOLAZOV,%20D.Yu.&BUDINSKA,%20B.&SACHSER,%20R.&rft.genre=preprint |
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