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

• Main Authors: Yagil, A., Almoalem, A., Soumyanarayanan, Anjan, Tan, Anthony K. C., Raju, M., Panagopoulos, Christos, Auslaender, O. M.
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2019
• Subjects: Skyrmions; Multilayer Films; DRNTU::Science::Physics
• Online Access: https://hdl.handle.net/10356/88384; http://hdl.handle.net/10220/47611
• Institution: Nanyang Technological University

Skyrmions are nanoscale spin configurations with topological properties that hold great promise for spintronic devices. Here, we establish their Néel texture, helicity, and size in Ir/Fe/Co/Pt multilayer films by constructing a multipole expansion to model their stray field signatures and applying it to magnetic force microscopy images. Furthermore, the demonstrated sensitivity to inhomogeneity in skyrmion properties, coupled with a unique capability to estimate the pinning force governing dynamics, portend broad applicability in the burgeoning field of topological spin textures.