Radially dependent stray field signature of chiral magnetic skyrmions

authored by
Craig Barton, Alexander Fernández scarioni, Baha Sakar, Sibylle Sievers, Felipe Garcia-Sanchez, Phillip Thompson, Fernando Ajejas, William Legrand, Nicolas Reyren, Thomas Thomson, Vincent Cros, Hans W. Schumacher, Olga Kazakova

Magnetic skyrmions are topological spin structures that arise in chiral magnetic systems which exhibit broken inversion symmetry and high spin-orbit coupling resulting in a sizable Dzyaloshinskii-Moriya interaction. Understanding the local spin texture of skyrmions is a vital metrological step in the development of skyrmionic technologies required for novel logic or storage devices in addition to providing fundamental insight into the nanoscale chiral interactions inherent to these systems. Here, we propose that there exists a radially dependent stray field signature that emanates from magnetic skyrmions. We employ quantitative magnetic force microscopy to experimentally explore this stray field signature. To corroborate the experimental observations a semianalytical model is developed which is validated against micromagnetic simulations. This unique approach provides a route to understand the unique radially dependent field signature from skyrmions, which allows an understanding of the underlying local magnetization profile to be obtained. From a practical standpoint, our results provide a rapid approach to validate outputs from numerical or micromagnetic simulations. This approach could be employed to optimize the complex matrix of magnetic parameters required for fabricating and modeling skyrmionic systems, in turn accelerating the technology readiness level of skyrmionic based devices.

External Organisation(s)
National Metrology Institute of Germany (PTB)
National Physical Laboratory (NPL)
Universidad de Salamanca
University of Manchester
Université Paris-Saclay
Physical Review B
Publication date
Publication status
Peer reviewed
ASJC Scopus subject areas
Electronic, Optical and Magnetic Materials, Condensed Matter Physics
Electronic version(s)
https://doi.org/10.1103/physrevb.108.104409 (Access: Closed)