Positional memory of Skyrmions in magnetic bilayers

Session Information

Location: amf. P7 | "Gheorghe Asachi" Technical University of Iași (TUIAȘI)
Day: 2. Tuesday 16
Time: 08:50-09:00
Chairperson: N/A

Presentation Details

Presentation Type: Poster presentation
Title: Positional memory of Skyrmions in magnetic bilayers
Abstract: We numerically and analytically study the transient dynamics of magnetic skyrmions in synthetic antiferromagnets under a magnetic field gradient. We consider skyrmions in a bilayer with antiferromagnetic coupling between the layers. The skyrmions in the two layers move almost perpendicular to the field gradient and the motion is eventually halted with the two skyrmions at a distance from each other. We find that the skyrmion displacement is proportional to the field gradient, while the time it takes to reach their final position is almost independent of it. Below a critical magnetic field gradient strength, the system displays an unusual `remembering' dynamics: when the magnetic field gradient is removed, the skyrmions return to their original positions to a high degree of accuracy. We explain this observation and other quantitative features using a moduli space dynamics approximation.

Presenter

Ms Anusree Navallur
University of Crete | Greece

Authors

1. Navallur, Anusree | Department of Mathematics and Applied Mathematics, University of Crete
2. Barton-Singer, Bruno | Institute of Applied and Computational Mathematics, FORTH, Heraklion, Crete, Greece
3. Komineas, Stavros | Department of Mathematics and Applied Mathematics, University of Crete