Strain-mediated multistate skyrmion for neuron devices

Shi, Shengbin; Zhao, Yunhong; Sun, Jiajun; Yu, Guoliang; Zhou, Haomiao; Wang, Jie

doi:10.1039/d4nr01464b

Nanoscale

2024

DOI: 10.1039/d4nr01464b

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Strain-mediated multistate skyrmion for neuron devices

Shengbin Shi,

Yunhong Zhao,

Jiajun Sun

et al.

Abstract: Magnetic skyrmions are potential candidates for neuromorphic computing because of their inherent topological stability, low drive current density and nanoscale size. However, the artificial neuron device based on current driven...

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Cited by 3 publications

References 63 publications

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Exponential dependence between motion acceleration and diameters of skyrmions under the driven of periodical strains

Wu,

Zhao,

et al. 2024

Applied Physics Letters

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The internal strain in practical materials is usually seen as defects and a large of methods have been proposed to avoid its appearance. However, strains in magnetic materials can be effective in regulating the performance mediated by magnetoelastic coupling effect. Herein, we theoretically demonstrate the motion of skyrmions driven by time-dependent periodical strains which imitate strain fluctuations in real materials. It is found that the motion acceleration of skyrmions is exponential correlation with diameters and skyrmions can be rebounded near the end of magnetic racetrack for larger size of diameters. Such a motion results from the excitation of spin wave modes on the position of circular domain walls in skyrmions. Our results can provide insight for manipulating skyrmions by strain engineering for applications in information storage and processing.

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Exponential dependence between motion acceleration and diameters of skyrmions under the driven of periodical strains

Wu,

Zhao,

et al. 2024

Applied Physics Letters

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Magnetic order in nanogranular iron germanium (Fe_0.53Ge_0.47) films

Zielinski,

Nguyen,

Herrington

et al. 2024

J. Phys.: Condens. Matter

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We study the effect of strain on the magnetic properties and magnetization configurations in nanogranular FexGe1−x films (x = 0.53 ±0.05) with and without B20 FeGe nanocrystals surrounded by an amorphous structure. Relaxed films on amorphous silicon nitride membranes reveal a disordered skyrmion phase while films near and on top of a rigid substrate favor ferromagnetism and an anisotropic hybridization of Fe d levels and spin-polarized Ge sp band states. The weakly coupled topological states emerge at room temperature and become more abundant at cryogenic temperatures without showing indications of pinning at defects or confinement to individual grains. These results demonstrate the possibility to control magnetic exchange and topological magnetism by strain and inform magnetoelasticity-mediated voltage control of topological phases in amorphous quantum materials.

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Magnetic skyrmion-based brain-inspired devices

Liu,

2024

Chin. Sci. Bull.

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Strain-mediated multistate skyrmion for neuron devices

Abstract: Magnetic skyrmions are potential candidates for neuromorphic computing because of their inherent topological stability, low drive current density and nanoscale size. However, the artificial neuron device based on current driven...

Cited by 3 publications

References 63 publications

Exponential dependence between motion acceleration and diameters of skyrmions under the driven of periodical strains

Exponential dependence between motion acceleration and diameters of skyrmions under the driven of periodical strains

Magnetic order in nanogranular iron germanium (Fe_0.53Ge_0.47) films

Magnetic skyrmion-based brain-inspired devices

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Strain-mediated multistate skyrmion for neuron devices

Abstract: Magnetic skyrmions are potential candidates for neuromorphic computing because of their inherent topological stability, low drive current density and nanoscale size. However, the artificial neuron device based on current driven...

Cited by 3 publications

References 63 publications

Exponential dependence between motion acceleration and diameters of skyrmions under the driven of periodical strains

Exponential dependence between motion acceleration and diameters of skyrmions under the driven of periodical strains

Magnetic order in nanogranular iron germanium (Fe0.53Ge0.47) films

Magnetic skyrmion-based brain-inspired devices

Contact Info

Product

Resources

About

Magnetic order in nanogranular iron germanium (Fe_0.53Ge_0.47) films