Magnetic skyrmionium diode with a magnetic anisotropy voltage gating

Wang, Junlin; Xia, Jingbo; Zhang, Xichao; Zheng, Xiangyu; Li, Guanqi; Chen, Li; Zhou, Yan; Wu, Jing; Yin, Haihong; Chantrell, R.W.; Xu, Yongbing

doi:10.1063/5.0025124

Cited by 38 publications

(24 citation statements)

References 42 publications

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“…1,2 Owing to the unidirectional operation of the electrical diode, considerable interest has been generated in various physical disciplines, including acoustics, 3 microuidics, 4 photonics, 5 thermodynamics, 6 and micromagnetism. 7 Magnetic skyrmions, a nonlinear nanoscale spin texture, found in chiral magnets with broken inversion symmetry, can be viewed as viable information carriers due to their particle-like nature benetting from unidirectional transport for diode applications. 8,9 The unique properties of skyrmions, such as topological stability, nanoscale size, and ultra-low driving current density, make them ideal candidates for spintronic applications.…”

Section: Introductionmentioning

confidence: 99%

Antiferromagnetic skyrmion-based high speed diode

2023

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Section: Introductionmentioning

confidence: 99%

Antiferromagnetic skyrmion-based high speed diode

2023

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“…[44,45]. Several works have demonstrated that the zero net topological charge of a skyrmionium allows its motion along the driving current without transverse drift [44][45][46][47][48][49][50].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of ferrimagnetic skyrmionium driven by spin-orbit torque

Liang,

Zhang,

Shen

et al. 2021

Preprint

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Magnetic skyrmionium is a skyrmion-like spin texture with nanoscale size and high mobility. It is a topologically trivial but dynamically stable structure, which can be used as a non-volatile information carrier for next-generation spintronic storage and computing devices. Here, we study the dynamics of a skyrmionium driven by the spin torque in a ferrimagnetic nanotrack. It is found that the direction of motion is jointly determined by the internal configuration of a skyrmionium and the spin polarization vector. Besides, the deformation of a skyrmionium induced by the intrinsic skyrmion Hall effect depends on both the magnitude of the driving force and the net angular momentum. The ferrimagnetic skyrmionium is most robust at the angular momentum compensation point, whose dynamics is quite similar to the skyrmionium in antiferromagnet. The skyrmion Hall effect is perfectly prohibited, where it is possible to observe the position of the skyrmionium by measuring the magnetization. Furthermore, the current-induced dynamics of a ferrimagnetic skyrmionium is compared with that of a ferromagnetic and antiferromagnetic skyrmionium. We also make a comparison between the motion of a ferrimagnetic skyrmionium and a skyrmion. Our results will open a new field of ferrimagnetic skyrmioniums for future development of ferrimagnetic spintronics devices.

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“…Skyrmion domains can become punctured, thereby leading to the formation of concentric skyrmions with opposite topological charges upon unloading of the pressure. The combination of the two oppositely charged skyrmions form a topological composite called skyrmionium, which has been investigated in magnetic materials for next generation spintronics based devices ,− but not in ferroelectric materials. To the best of our knowledge, this is the first demonstration of skyrmion-to-skyrmionium “reaction” in ferroelectric materials.…”

mentioning

confidence: 99%

Squishing Skyrmions: Symmetry-Guided Dynamic Transformation of Polar Topologies Under Compression

Linker

Nomura

Fukushima

et al. 2022

J. Phys. Chem. Lett.

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Mechanical controllability of recently discovered topological defects (e.g., skyrmions) in ferroelectric materials is of interest for the development of ultralow-power mechano-electronics that are protected against thermal noise. However, fundamental understanding is hindered by the “multiscale quantum challenge” to describe topological switching encompassing large spatiotemporal scales with quantum mechanical accuracy. Here, we overcome this challenge by developing a machine-learning-based multiscale simulation frameworka hybrid neural network quantum molecular dynamics (NNQMD) and molecular mechanics (MM) method. For nanostructures composed of SrTiO3 and PbTiO3, we find how the symmetry of mechanical loading essentially controls polar topological switching. We find under symmetry-breaking uniaxial compression a squishing-to-annihilation pathway versus formation of a topological composite named skyrmionium under symmetry-preserving isotropic compression. The distinct pathways are explained in terms of the underlying materials’ elasticity and symmetry, as well as the Landau–Lifshitz–Kittel scaling law. Such rational control of ferroelectric topologies will likely facilitate exploration of the rich ferroelectric “topotronics” design space.

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Magnetic skyrmionium diode with a magnetic anisotropy voltage gating

Cited by 38 publications

References 42 publications

Antiferromagnetic skyrmion-based high speed diode

Antiferromagnetic skyrmion-based high speed diode

Dynamics of ferrimagnetic skyrmionium driven by spin-orbit torque

Squishing Skyrmions: Symmetry-Guided Dynamic Transformation of Polar Topologies Under Compression

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