Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf

Micromagnetic structures have been a subject of magnetism research since many years. Among those structures, magnetic vortices are of special interest as they exhibit a non-trivial topology and various dynamic eigenmodes [1]. Such a vortex consists of a planar flux-closure magnetization curl that turns perpendicular to the plane only in the very small central core region. Both, the curl’s sense (circulation: c) and the core orientation (polarity: p) can be in either of two different states, giving rise to a binary handednes h=cp of the system. Extensive studies on the static and dynamic properties of single layer vortices led to the proposal of their application for memory cells and spin-transfer oscillators. From the viewpoint of these two concepts but also from a fundamental perspective, the coupling between spatially confined vortices is a key issue to address [2].