Stray field signatures of Néel textured skyrmions in Ir/Fe/Co/Pt multilayer films

ORAL

Abstract

The development of technologically relevant skyrmions in multilayer films will require magnetic imaging methods sensitive to their spin structure, and translatable to device configurations. We present recent work [1] in which we use a multipole expansion to quantitatively describe the magnetic field of individual skyrmions in order to analyze low-temperature magnetic force microscopy (MFM) data. By using specific multipole signatures of skyrmions of different spin structure, we establish their Néel texture and helicity in a Ir/Fe/Co/Pt film at 5K. The demonstrated sensitivity to inhomogeneity provides a route for characterizing individual skyrmions in devices, and allows us to quantitatively analyze MFM images [2].

[1] A. Yagil, A. Almoalem, Anjan Soumyanarayanan, Anthony K. C. Tan, M. Raju, C. Panagopoulos, and O. M. Auslaender, arXiv:1705.07608 (2017).
[2] M. Raju, A. Yagil, Anjan Soumyanarayanan, Anthony K. C. Tan, A. Almoalem, O. M. Auslaender, and C. Panagopoulos, arXiv:1708.04084 (2017).

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Presenters

  • Ophir Auslaender

    • Physics, Technion

Authors

  • Alon Yagil

    • Physics, Technion

  • Avior Almoalem

    • Physics, Technion

  • Anjan Soumyanarayanan

    • Data Storage Institute

  • Anthony K. C. Tan

    • Data Storage Institute

  • M. Raju

    • Division of Physics and Applied Physics, Nanyang Technological University

  • Christos Panagopoulos

    • Division of Physics and Applied Physics, Nanyang Technological University

  • Ophir Auslaender

    • Physics, Technion