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Thermal evolution of skyrmion formation mechanism in chiral multilayer films
- Source :
- Phys. Rev. Applied 17, 044039 (2022)
- Publication Year :
- 2022
-
Abstract
- Magnetic skyrmions form in chiral multilayers from the shrinking or fission of elongated stripe textures. Here we report an experimental and theoretical study of the temperature dependence of this stripe-to-skyrmion transition in Co/Pt-based multilayers. Field-reversal magnetometry and Lorentz microscopy experiments over 100 - 350 K establish the increased efficacy of stripe-to-skyrmion fission at higher temperatures - driven primarily by the thermal evolution of key magnetic interactions - thereby enhancing skyrmion density. Atomistic calculations elucidate that the energy barrier to fission governs the thermodynamics of the skyrmion formation. Our results establish a mechanistic picture of the stripe-to-skyrmion transition and advance the use of thermal knobs for efficient skyrmion generation.<br />Comment: 11 pages, 11 figures
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Applied 17, 044039 (2022)
- Publication Type :
- Report
- Accession number :
- edsarx.2203.12279
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevApplied.17.044039