Scattering modes of skyrmions in a bilayer system with ferromagnetic coupling

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dc.contributor.authorVojkovic, S.
dc.contributor.authorCacilhas, R.
dc.contributor.authorPereira, A. R.
dc.contributor.authorAltbir, D.
dc.contributor.authorNunez, A. S.
dc.contributor.authorCarvalho-Santos, V. L.
dc.date.accessioned2025-01-20T23:53:30Z
dc.date.available2025-01-20T23:53:30Z
dc.date.issued2021
dc.description.abstractMagnetic skyrmions are quasiparticle-like textures that are topologically different from a single domain magnetization state. Their topological protection, combined with the low current density needed to move them, make these objects relevant to be used as information storage structures. In such a context, the analysis of the interactions between skyrmions is interesting and relevant for future applications. In this work, through micromagnetic simulations and numerical calculations, we studied the interaction between two skyrmions living on different parallel ferromagnetic racetracks connected by an exchange-like interaction. The upper and lower racetracks are separated by a height offset and the interaction between the upper and the lower skyrmion is analyzed in terms of the magnetic and geometrical parameters. Three states are predicted, as a function of these parameters: scattered or free skyrmions, bound skymions, and annihilated skyrmions. Our results, presented in a phase diagram, demonstrate that even in the case here called free skyrmions, there is a small and brief interaction when both are close enough, but the skyrmion in the top layer does not drag the skyrmion in the bottom layer. For bound skyrmions, both keep linked during larger times. In the latter case, there are strong changes in the velocity of the skyrmions induced by the effect of a higher effective mass when both are coupled.
dc.fuente.origenWOS
dc.identifier.doi10.1088/1361-6528/abd714
dc.identifier.eissn1361-6528
dc.identifier.issn0957-4484
dc.identifier.urihttps://doi.org/10.1088/1361-6528/abd714
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/94970
dc.identifier.wosidWOS:000620945200001
dc.issue.numero17
dc.language.isoen
dc.revistaNanotechnology
dc.rightsacceso restringido
dc.subjectskyrmions
dc.subjectinteraction
dc.subjectmagnetization
dc.subjectThiele&#8217
dc.subjects equation
dc.subjectmicromagnetism
dc.titleScattering modes of skyrmions in a bilayer system with ferromagnetic coupling
dc.typeartículo
dc.volumen32
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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