Static and dynamic properties of vortex pairs in asymmetric nanomagnets

Autor: B. C. Koop, M. Gruschke, T. Descamps, A. Bondarenko, B. A. Ivanov, V. Korenivski
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: AIP Advances, Vol 6, Iss 5, Pp 056406-056406-6 (2016)
Druh dokumentu: article
ISSN: 2158-3226
DOI: 10.1063/1.4944515
Popis: Stacked spin-vortex pairs in magnetic multilayered nanopillars, with vertical separation between the vortices small compared to the vortex core size and pure magnetostatic coupling, exhibit spin dynamics absent in individual vortices. This dynamics is nonlinear and is due to the strong direct core-core coupling in the system, dominating energetically for small-signal excitation. We observe and explain the appearance of spin resonance modes, forbidden within linear dynamics, and discuss how they depend on the magnetic and morphological asymmetries in the samples.
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