Static and dynamic properties of vortex pairs in asymmetric nanomagnets

Journal Article · Sun May 15 00:00:00 EDT 2016 · AIP Advances

DOI:https://doi.org/10.1063/1.4944515· OSTI ID:22611776

Koop, B. C.; Gruschke, M.; Descamps, T.; Korenivski, V. ^[1]; Bondarenko, A.; Ivanov, B. A. ^[2]

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1. Royal Institute of Technology, 10691 Stockholm (Sweden)
2. Institute of Magnetism, National Academy of Science, 03142 Kiev (Ukraine)

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.

• OSTI ID: 22611776
• Journal Information: AIP Advances, Vol. 6, Issue 5; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ASYMMETRY
COMPARATIVE EVALUATIONS
COUPLING
EXCITATION
LAYERS
MAGNETS
NANOSTRUCTURES
RESONANCE
SPIN
VORTICES