Static and Dynamical Properties of Antiferromagnetic Skyrmions in the Presence of Applied Current and Temperature

Barker, Joseph; Tretiakov, Oleg A.

doi:10.1103/physrevlett.116.147203

Cited by 573 publications

(546 citation statements)

References 26 publications

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“…This opposition cancels the Magnus force and thus eliminates the unwanted transverse velocity, thereby enhancing skyrmion mobility, as computed by Barker and Tretiakov (2016). Since bulk DMI prevails in antiferromagnetic materials, the prospect for skyrmions in antiferromagnets is potentially more promising.…”

Section: A Experimental Observation Of Antiferromagnetic Texturesmentioning

confidence: 99%

Antiferromagnetic spintronics

et al. 2018

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Antiferromagnetic materials could represent the future of spintronic applications thanks to the numerous interesting features they combine: they are robust against perturbation due to magnetic fields, produce no stray fields, display ultrafast dynamics, and are capable of generating large magnetotransport effects. Intense research efforts over the past decade have been invested in unraveling spin transport properties in antiferromagnetic materials. Whether spin transport can be used to drive the antiferromagnetic order and how subsequent variations can be detected are some of the thrilling challenges currently being addressed. Antiferromagnetic spintronics started out with studies on spin transfer and has undergone a definite revival in the last few years with the publication of pioneering articles on the use of spin-orbit interactions in antiferromagnets. This paradigm shift offers possibilities for radically new concepts for spin manipulation in electronics. Central to these endeavors are the need for predictive models, relevant disruptive materials, and new experimental designs. This paper reviews the most prominent spintronic effects described based on theoretical and experimental analysis of antiferromagnetic materials. It also details some of the remaining bottlenecks and suggests possible avenues for future research. This review covers both spin-transfer-related effects, such as spin-transfer torque, spin penetration length, domain-wall motion, and "magnetization" dynamics, and spin-orbit related phenomena, such as (tunnel) anisotropic magnetoresistance, spin Hall, and inverse spin galvanic effects. Effects related to spin caloritronics, such as the spin Seebeck effect, are linked to the transport of magnons in antiferromagnets. The propagation of spin waves and spin superfluids in antiferromagnets is also covered.

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Section: A Experimental Observation Of Antiferromagnetic Texturesmentioning

confidence: 99%

Antiferromagnetic spintronics

et al. 2018

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“…37,40 Annihilation of the skyrmions at the edge due to the Magnus force and the drift away from the nanotrack have been studied intensively in recent years. 26,[33][34][35]41,42 Most recently, it has been shown that the edge instability of a thin film with DMI can trigger the creation of skyrmions close to the edge. 43 Additionally, the movements of skyrmions even including the oscillating motion 44 and the gyration 45 are affected by the edges in confined geometries due to their potential force [44][45][46] acting on skyrmions.…”

Section: Introductionmentioning

confidence: 99%

The influence of the edge effect on the skyrmion generation in a magnetic nanotrack

et al. 2017

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Magnetic skyrmions might be used for building next-generation nanomagnetic and spintronic devices, as they have several perspective properties, such as topologically protected stability, nanoscale size, and ultra-low depinning current density. Here we study the influence of the edge effect on the current-induced generation of a magnetic skyrmion in a finite-length thin-film ferromagnetic nanotrack with interface-induced Dzyaloshinskii-Moriya interaction. It shows that a stable skyrmion or a bunch of skyrmions can be successfully generated as long as the distance between the current injection region and the nanotrack terminal is larger than a certain threshold. We investigate the failed skyrmion generation caused by the edge effect, which will lead to an error writing event. We also present the phase diagrams of the skyrmion generation obtained for different material and geometric parameters. Our results could be useful for designing skyrmion-based information storage devices.

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“…Secondly, skyrmions in an antiferromagnet are less sensitive to magnetic fields. Thirdly, they move faster, and in the direction of the charge current (while skyrmions in ferromagnets experience a Magnus force with a significant component perpendicular to their trajectory [19]), which makes it easier to control them [20]. For these reasons, skyrmions have been investigated in many different antiferromagnetic systems, ranging from doped bulk materials [21], Bose-Einstein condensates [22], and various triangular lattice antiferromagnets [23,24] to nanodisks [25].…”

mentioning

confidence: 99%

“…For these reasons, skyrmions have been investigated in many different antiferromagnetic systems, ranging from doped bulk materials [21], Bose-Einstein condensates [22], and various triangular lattice antiferromagnets [23,24] to nanodisks [25]. Isolated AFM skyrmions [26,27], as well as moving skyrmions in AFMs, have been considered theoretically [20,28,29].…”

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confidence: 99%

Skyrmions in square-lattice antiferromagnets

et al. 2016

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The ground states of square-lattice two-dimensional antiferromagnets with anisotropy in an external magnetic field are determined using Monte Carlo simulations and compared to theoretical analysis. We find a phase in between the spin-flop and spiral phase that shows strong similarity to skyrmions in ferromagnetic thin films. We show that this phase arises as a result of the competition between Zeeman and Dzyaloshinskii-Moriya interaction energies of the magnetic system. Moreover, we find that isolated (anti-)skyrmions are stabilized in finite-sized systems, even at higher temperatures. The existence of thermodynamically stable skyrmions in square-lattice antiferromagnets provides an appealing alternative over skyrmions in ferromagnets as data carriers.

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Static and Dynamical Properties of Antiferromagnetic Skyrmions in the Presence of Applied Current and Temperature

Cited by 573 publications

References 26 publications

Antiferromagnetic spintronics

Antiferromagnetic spintronics

The influence of the edge effect on the skyrmion generation in a magnetic nanotrack

Skyrmions in square-lattice antiferromagnets

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