Interlayer Coupled Magnetic Vortices


Interlayer Coupled Magnetic Vortices

Wintz, S.; Puzic, A.; Strache, T.; Bunce, C.; Körner, M.; Liedke, M. O.; Banholzer, A.; Buhl, M.; Bernert, K.; Moench, I.; Mattheis, R.; McCord, J.; Raabe, J.; Quitmann, C.; Erbe, A.; Fassbender, J.

Micromagnetic structures have been a focus of both fundamental and technological research for several decades. As a part of this effort, spin vortices (which are characterized by an in-plane magnetization curl and a small out-of-plane core region) have attracted much attention due to their chiral nature and the variety of dynamic phenomena associated with them. Although the static and dynamic properties of individual vortices are now reasonably well understood, there have been relatively few studies addressing their mutual interactions, particularly for the case of a vertically stacked arrangement. Here we present experimental findings on vortex coupling in trilayer elements, where two ferromagnetic layers are separated by a nonmagnetic spacer. For these systems the relative configurations of the in-plane flux senses (circulations) as well as the core orientations (polarities) of layered vortices have been identified by means of scanning transmission x-ray microscopy (STXM). The dominant coupling mechanisms here are the magneto-dipolar interaction and interlayer exchange coupling (IEC).

Keywords: magnetic vortex; vortex coupling; vortex dynamics; STXM; interlayer exchange coupling

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  • Lecture (Conference)
    Intermag 2011 (IEEE International Magnetics Conference), 25.-29.04.2011, Taipeh, Taiwan

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Publ.-Id: 15114