Magnetization Reversal Signatures of Hybrid and Pure Néel Skyrmions in Thin Film Multilayers
arXiv:2103.14527 · doi:10.1063/5.0022033
Abstract
We report a study of the magnetization reversals and skyrmion configurations in two systems - Pt/Co/MgO and Ir/Fe/Co/Pt multilayers, where magnetic skyrmions are stabilized by a combination of dipolar and Dzyaloshinskii-Moriya interactions (DMI). First Order Reversal Curve (FORC) diagrams of low-DMI Pt/Co/MgO and high-DMI Ir/Fe/Co/Pt exhibit stark differences, which are identified by micromagnetic simulations to be indicative of hybrid and pure Néel skyrmions, respectively. Tracking the evolution of FORC features in multilayers with dipolar interactions and DMI, we find that the negative FORC valley, typically accompanying the positive FORC peak near saturation, disappears under both reduced dipolar interactions and enhanced DMI. As these conditions favor the formation of pure Neel skyrmions, we propose that the resultant FORC feature - a single positive FORC peak near saturation - can act as a fingerprint for pure Néel skyrmions in multilayers. Our study thus expands on the utility of FORC analysis as a tool for characterizing spin topology in multilayer thin films.
11 pages, 4 figures
References in corpus (6)
- Additive interfacial chiral interaction in multilayers for stabilization of small individual skyrmion at room temperature
- Chirality in magnetic multilayers probed by the symmetry and the amplitude of dichroism in X-ray resonant magnetic scattering
- Stabilizing zero-field skyrmions in Ir/Fe/Co/Pt thin film multilayers by magnetic history control
- Frustration Driven Stripe Domain Formation in Co/Pt Multilayer Films
- Influence of the Dzyaloshinskii-Moriya interaction on the spin-torque diode effect
- Enhancement of Zero-Field Skyrmion Density in [Pt/Co/Fe/Ir]2 Multilayers by FORC
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- Field-driven collapsing dynamics of skyrmions in magnetic multilayers
- Nano-engineering the evolution of skyrmion crystal in synthetic antiferromagnets
- Beyond conventional skyrmions in synthetic antiferromagnets