Dresden 2011 – wissenschaftliches Programm
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KR: Fachgruppe Kristallographie
KR 5: Poster Multiferroics (Joint Session of MA, DF, DS, KR, TT)
KR 5.106: Poster
Dienstag, 15. März 2011, 10:45–13:00, P2
Vortex coupling in magnetic multilayer elements — •Sebastian Wintz1, Aleksandar Puzic2, Thomas Strache1, Christopher Bunce1, Michael Körner1, Tommy Schoenherr1, Andreas Neubert1, Jeffrey McCord1, Ingolf Moench3, Roland Mattheis4, Jörg Raabe2, Christoph Quitmann2, Artur Erbe1, and Jürgen Fassbender1 — 1Helmholtz-Zentrum Dresden Rossendorf, 01314 Dresden, Germany — 2Paul Scherrer Institut 5232 Villigen, Switzerland — 3Leibniz-Institut für Werkstoff- und Festkörperforschung, 01069 Dresden, Germany — 4Institut für Photonische Technologien, 07702 Jena, Germany
Spin vortices have attracted much attention due to their chiral nature and the variety of dynamic phenomena associated with them. In this contribution we present experimental findings on vortex coupling in trilayer elements, where two ferromagnetic layers are separated by a nonmagnetic spacer. For such systems the relative configurations of the in-plane flux senses (circulations) as well as the core orientations (polarities) of layered vortices are 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). Remarkably, a modification of the IEC, which can be induced by noble gas ion irradiation, allows to specifically set the circulation configuration of a layered vortex pair to be either antiferromagnetic or ferromagnetic. In addition, time-resolved measurements of the response of interlayer coupled vortices to an excitation by sinusoidal magnetic fields will be shown.