Static and dynamic properties of vortex pairs in asymmetric nanomagnets

• 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.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

Spin dynamics

Dynamic property

Linear dynamics

Magneto-static couplings

Multi-layered

Signal excitation

Spin resonance

Vertical separation

Vortex cores

Vortex flow

Publikations- och innehållstyp

ref (ämneskategori)

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