Skyrmion Fluid and Bimeron Glass Protected by a Chiral Spin Liquid on a Kagome Lattice

Rosales, H. D.; Albarracín, F. A. Gómez; Pujol, Pierre; Jaubert, Ludovic D. C.

doi:10.1103/physrevlett.130.106703

Cited by 18 publications

(4 citation statements)

References 62 publications

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“…The trajectories of the skyrmions during motion can be described by the R = (x c , y c ) based on the congruent relationship between the central spin and the position of a skyrmion [58,59]. However, some errors occur when calculating trajectories for multi-skyrmions, we select the central part with the opposite direction (S z < 0) as the position of the skyrmions.…”

Section: Methodsmentioning

confidence: 99%

Dynamic behavior of skyrmion collision: spiral and breath

Shi,

Zhao,

Sun

et al. 2023

New J. Phys.

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A magnetic skyrmion is a particle-like topological soliton, which is an ideal candidate for developing high-density storage and logic devices due to its nonvolatility and tunability. In view of the particle motion characteristics of skyrmion, different skyrmions in a material inevitably interact in the form of short-range repulsion and long-range attraction. In this work, the dynamic characteristics of skyrmion collision in a ferromagnetic Co thin film are investigated by using micromagnetic simulations. It is found that the dynamic behavior of skyrmion after collision is highly dependent on the size of the strip, the initial velocity of skyrmion and magnetic damping constant. For the collision of two skyrmions, when the strip width exceeds the critical value, the skyrmions form a pair and rotate counterclockwise in the form of spiral and breath. It is interesting that the rotation and breath of skyrmions keep the same periodicity under the negligible damping, and the frequency increases with the increase of the initial velocity of skyrmion. Further, the collision of a system of three skyrmions reveals that they interact in pairs to form closed periodic trajectories. The results of the present work not only give an insight into the multi-skyrmion dynamics, but also provide guidance for the development of spintronic devices based on multi-skyrmion motion.

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Section: Methodsmentioning

confidence: 99%

Dynamic behavior of skyrmion collision: spiral and breath

Shi,

Zhao,

Sun

et al. 2023

New J. Phys.

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“…3(d). This indicates the emergence of skyrmion liquids or spiral spin liquids [80][81][82][83][84][85] as a result of the melting of the higher-order SkXs by the large electric field, although a further investigation for larger system sizes is required to conclude whether such liquid states remain stable.…”

Section: A High Frequency Regimementioning

confidence: 99%

Skyrmion crystals in centrosymmetric itinerant magnets without horizontal mirror plane

Yambe

Hayami

2021

Sci Rep

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We theoretically investigate a new stabilization mechanism of a skyrmion crystal (SkX) in centrosymmetric itinerant magnets with magnetic anisotropy. By considering a trigonal crystal system without the horizontal mirror plane, we derive an effective spin model with an anisotropic Ruderman–Kittel–Kasuya–Yosida (RKKY) interaction for a multi-band periodic Anderson model. We find that the anisotropic RKKY interaction gives rise to two distinct SkXs with different skyrmion numbers of one and two depending on a magnetic field. We also clarify that a phase arising from the multiple-Q spin density waves becomes a control parameter for a field-induced topological phase transition between the SkXs. The mechanism will be useful not only for understanding the SkXs, such as that in Gd$$_2$$ 2 PdSi$$_3$$ 3 , but also for exploring further skyrmion-hosting materials in trigonal itinerant magnets.

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“…Here, isolated skyrmions rather than a skyrmion lattice phase have been observed in our samples. Skyrmion lattices usually appear in bulk materials, where the bulk Dzyaloshinskii-Moriya interaction (DMI) stabilises the topological structures [8,[42][43][44]. In a thin film system, metastable isolated skyrmions have been observed for 0 < κ < 1 and skyrmion lattice phase for κ 1.…”

Section: Resultsmentioning

confidence: 99%

Observation of topological hall effect and skyrmions in Pt/Co/Ir/Co/Pt system

Mohanty,

Ojha,

Sharma

et al. 2024

Mater. Res. Express

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The interlayer exchange coupling (IEC) between two ferromagnetic (FM) layers separated by a non-magnetic (NM) spacer layer gives rise to different types of coupling with the variation of spacer layer thickness. When the NM is metallic, the IEC is attributed to the well-known Ruderman–Kittel–Kasuya–Yosida (RKKY) interaction which shows an oscillatory decaying nature with increasing thickness. Due to this, it is possible to tune the coupling between the two FM to be either ferromagnetic or antiferromagnetic. In this work we have studied a Pt/Co/Ir/Co/Pt system where the Co thickness has been taken in the strong perpendicular magnetic anisotropy regime which is much less than the spin reorientation transition thickness. By tuning the Ir thickness to 2.0 nm, a canted state of magnetization reversal in the system is observed which gives rise to a possibility of nucleating topologically non-trivial spin textures like skyrmions. Further, with the combination of transport and magnetic force microscopy (MFM) measurements, we have confirmed the presence of skyrmions in our system. These findings may be useful for potential applications in emerging spintronic and data storage technologies using skyrmions.

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Skyrmion Fluid and Bimeron Glass Protected by a Chiral Spin Liquid on a Kagome Lattice

Cited by 18 publications

References 62 publications

Dynamic behavior of skyrmion collision: spiral and breath

Dynamic behavior of skyrmion collision: spiral and breath

Skyrmion crystals in centrosymmetric itinerant magnets without horizontal mirror plane

Observation of topological hall effect and skyrmions in Pt/Co/Ir/Co/Pt system

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