Current-driven vortex oscillations in metallic nanocontacts
Q. Mistral, M. van Kampen, G. Hrkac, Joo-Von Kim, T. Devolder, P., Crozat, C. Chappert, L. Lagae, T. Schrefl
TL;DR
This paper reports experimental observation of spin-transfer vortex oscillations in metallic nano-contacts, demonstrating large orbital vortex motion and confirming findings with theory and simulations.
Contribution
It provides the first experimental evidence linking spin-transfer effects to vortex orbital motion in metallic nano-contacts, supported by analytical and simulation validation.
Findings
Observation of sub-GHz vortex oscillations
Vortex executes large-amplitude orbital motion
Agreement with analytical theory and micromagnetics simulations
Abstract
We present experimental evidence of sub-GHz spin-transfer oscillations in metallic nano-contacts that are due to the translational motion of a magnetic vortex. The vortex is shown to execute large-amplitude orbital motion outside the contact region. Good agreement with analytical theory and micromagnetics simulations is found.
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