Skyrmion pinning by disk-shaped defects

Gong, X.; Jing, K. Y.; Lü, Jie; Wang, Xiang Rong

doi:10.1103/physrevb.105.094437

Cited by 8 publications

(5 citation statements)

References 47 publications

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“…[70] Skyrmion dynamics is often sensitive to the skyrmion wall thickness. [72] Spin helix (stripe) evolves into skyrmion crystals and subsequently into the ferromagnetic state as an external magnetic field increases. [67,68,70,71] The featured size of magnetic skyrmions is comparable to λ .…”

Section: Magnetic Skyrmion Materialsmentioning

confidence: 99%

Progress and challenges in magnetic skyrmionics

Wang

2022

Chinese Phys. B

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Magnetic skyrmions are two-dimensional localized topological spin-structures characterized by the skyrmion number that measures the number of times of spins wrapping the Bloch sphere. Skyrmions behave like particles under an external stimulus and are promising information carriers. Skyrmions can exist as an isolated object as well as skyrmion condensates in crystal structures, helical/conical states, mazes or irregular stripy states with emergent electromagnetic fields. Thus, skyrmions provide a nice platform for studying fundamental physics, other than its applications in spintronics. In this perspective, we briefly review some recent progress in the field and present an outlook of the fundamental challenges in device applications.

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Section: Magnetic Skyrmion Materialsmentioning

confidence: 99%

Progress and challenges in magnetic skyrmionics

Wang

2022

Chinese Phys. B

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“…Magnetic skyrmion, 1-3 a particle-like spin structure usually stabilized by Dzyaloshinskii-Moriya (DM) interaction, 4,5 has attracted much interest because of its rich physics [6][7][8] and possible implementations in various devices such as skyrmion diodes, 9,10 skyrmion ratchets, 11 racetrack memories, 12 logic gates, [13][14][15][16] and nano-oscillators. [17][18][19][20][21][22][23][24][25][26][27][28] Among them, nanooscillators based on skyrmions in circular nanodisks have been heavily studied because their high-frequency motion can be easily used for microwave generators and/or detectors.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of orbital skyrmions in a circular nanodisk

Feng

Zhang

Xiang

2023

Phys. Chem. Chem. Phys.

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“…[19][20][21] Recently, Wang et al theoretically showed that skyrmions can be pinned by disk-shaped defects. [22] On the other hand, skyrmions tend to experience a transverse deflection from the intended path of the driving force, which is known as the skyrmion Hall effect (SkHE), owing to the transverse Magnus force associated with nonzero topological skyrmion charge. [23,24] Subsequently, several methods have been proposed to overcome or eliminate SkHE.…”

Section: Introductionmentioning

confidence: 99%

Gate-voltage control of alternating-current-driven skyrmion propagation in the ferromagnetic nanotrack devices

et al. 2023

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Magnetic skyrmions, with topologically protected particle-like magnetization configurations, are promising information carriers for future spintronics devices with ultralow energy consumption. Generally, during motion, skyrmions suffer from the skyrmion Hall effect (SkHE) wherein the skyrmions deflect away from the intended path of the driving force. Numerous methods have been proposed to avoid this detrimental effect. In this study, we propose controllable alternating current (AC)-driven skyrmion propagation in a ferromagnetic nanowire based on the combination of gate-voltage-controlled magnetic anisotropy (VCMA) and SkHE. Micromagnetic simulations showed that a skyrmion oscillatory closed-loop-like in-situ motion that is driven by AC can be transformed into directional ratchet-like propagation along the nanotrack by creating a VCMA gates barrier. Additionally, we show that the skyrmion propagation conditions depend on the gate barrier potential and driving AC parameters, and they can be used for the optimal design of nanotrack devices. Moreover, this mechanism could be used to control skyrmion macroscopic propagation directions by dynamically alternating the voltage of another series of gates. We further show the dynamic control of the long-distance propagation of skyrmions along with the pinning state. The study results provide a promising route for designing future skyrmion-based spintronics logical and memory devices.

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Skyrmion pinning by disk-shaped defects

Abstract: If it is the author's pre-published version, changes introduced as a result of publishing processes such as copy-editing and formatting may not be reflected in this document. For a definitive version of this work, please refer to the published version.

Cited by 8 publications

References 47 publications

Progress and challenges in magnetic skyrmionics

Progress and challenges in magnetic skyrmionics

Dynamics of orbital skyrmions in a circular nanodisk

Gate-voltage control of alternating-current-driven skyrmion propagation in the ferromagnetic nanotrack devices

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