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Issue 21, 2015
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A new reversal mode in exchange coupled antiferromagnetic/ferromagnetic disks: distorted viscous vortex

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Abstract

Magnetic vortices have generated intense interest in recent years due to their unique reversal mechanisms, fascinating topological properties, and exciting potential applications. In addition, the exchange coupling of magnetic vortices to antiferromagnets has also been shown to lead to a range of novel phenomena and functionalities. Here we report a new magnetization reversal mode of magnetic vortices in exchange coupled Ir20Mn80/Fe20Ni80 microdots: distorted viscous vortex reversal. In contrast to the previously known or proposed reversal modes, the vortex is distorted close to the interface and viscously dragged due to the uncompensated spins of a thin antiferromagnet, which leads to unexpected asymmetries in the annihilation and nucleation fields. These results provide a deeper understanding of the physics of exchange coupled vortices and may also have important implications for applications involving exchange coupled nanostructures.

Graphical abstract: A new reversal mode in exchange coupled antiferromagnetic/ferromagnetic disks: distorted viscous vortex

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Publication details

The article was received on 23 Mar 2015, accepted on 27 Apr 2015 and first published on 28 Apr 2015


Article type: Paper
DOI: 10.1039/C5NR01856K
Citation: Nanoscale, 2015,7, 9878-9885
  • Open access: Creative Commons BY license
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    A new reversal mode in exchange coupled antiferromagnetic/ferromagnetic disks: distorted viscous vortex

    D. A. Gilbert, L. Ye, A. Varea, S. Agramunt-Puig, N. del Valle, C. Navau, J. F. López-Barbera, K. S. Buchanan, A. Hoffmann, A. Sánchez, J. Sort, K. Liu and J. Nogués, Nanoscale, 2015, 7, 9878
    DOI: 10.1039/C5NR01856K

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