Spin-wave-driven skyrmion dynamics in ferrimagnets: Effect of net angular momentum

Liu, Y.; Jin, Zuanming; Liu, T. T.; Hou, Zhipeng; Chen, D. Y.; Fan, Zhen; Zeng, Min; Lu, Xubing; Gao, Xingsen; Qin, Minghui; Liu, Jun‐Min

doi:10.1103/physrevb.106.064424

Cited by 13 publications

(4 citation statements)

References 52 publications

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“…旋的两套子晶格, 使得磁子的极化会拥有全自旋自由度. 因此, 磁子会经历所谓的拓扑磁子自旋霍尔效应, 即具有相反极化的磁子流经历自旋依赖的相反的有效洛伦兹力, 继而被斯格明子分离 [42][43][44][45] , 如图6(b)和图6(c)所示.…”

Section: 在反铁磁或者亚铁磁中由于体系具有相反自unclassified

Magnon Hall effect

Jin,

Zeng,

Cao

et al. 2024

Acta Phys. Sin.

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Hall effect is a ancient but highly potential subfield in condensed matter physics, its origin dates back hundreds of years. In 1879, Hall made the momentous discovery that when a current-carrying conductor is placed in a magnetic field, the Lorentz force presses its electrons against one side of the conductor. This intriguing phenomenon was dubbed as Hall effect. Afterwards, a series of novel Hall effects were discovered, including anomalous Hall effect, quantum Hall effect, spin Hall effect, topological Hall effect, and planar Hall effect, etc. Notably, Hall effects play an important role in information transport, since it enables the mutual transformation of current with different directions. In bosonic systems such as magnons, a series of magnon Hall effects have been found, jointly driving the development of the magnon-based spintronics. In this perspective, we review the Hall effect in magnonic systems in recent years, briefly describe its modern semi-classical theories, including fictitious electromagnetic field theory and scattering theory, etc. Furthermore, we introduce the different magnon Hall effect and clarify the physics behind them. Finally,the prospect of magnon Hall effect is discussed.

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Section: 在反铁磁或者亚铁磁中由于体系具有相反自unclassified

Magnon Hall effect

Jin,

Zeng,

Cao

et al. 2024

Acta Phys. Sin.

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“…To date, electrical manipulation of FiM skyrmions has been realized via the spin-transfer or spin-orbit torques. [10,16,17] The FiM skyrmion motion driven by spin-polarized current depends on the conduction electrons and generates Joule heat, [18,19] which is unfavorable for energy saving and device stability. In contrast, the FiM skyrmion dynamics driven by voltage-controlled magnetic anisotropy (VCMA) gradient can be notably highly efficient and energy saving.…”

Section: Introductionmentioning

confidence: 99%

Skyrmion Motion in Ferrimagnets Driven by Magnetic Anisotropy Gradient

Xu,

Yang,

Liu

et al. 2024

Physica Rapid Research Ltrs

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The topological skyrmions in ferrimagnet systems provide new opportunities to investigate the fundamental spin dynamics. Effective manipulation of ferrimagnet skyrmion motion is a vital task for future spintronics applications, motivating intense research on magnetization dynamics with voltage as driving sources. In this work, we investigated the skyrmion in ferromagnets driven by voltage controlled magnetic anisotropy gradients, which tends to move towards the low anisotropy area and has a constant velocity. We reported our Thiele’s theory analysis on the velocities of the skyrmion dependences on the anisotropy gradient, the net angular momentum density and the damping coefficient, which are confirmed nicely by the atomistic simulations. It is demonstrated that the velocity of the skyrmion reaches to a maximum value at a nonzero net angular momentum density δ s different from the domain wall and the Hall angle of ferrimagnet skyrmions can be controlled by δ s . Our results are useful for the understanding of ferrimagnet skyrmion dynamics and may open an alternative way for the design of ferrimagnet spintronic devices.This article is protected by copyright. All rights reserved.

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“…They have the characteristics of spins wrapping a unit sphere and the topological charge is an integer [1,2]. Over the past few years, because of their interesting characters such as driven by the ultralow currents [3], the high mobility and topologically-protected ability, skyrmions are recognized as a promising candidates in future quantum computing and magnetic memory devices with low energy consumption [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Skyrmion state stabilized by short-range interactions in centrosymmetric materials

Li¹,

Liu²,

Xie³

et al. 2023

Phys. Scr.

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Magnetic frustration can induce interesting magnetic phases including skyrmion state in centrosymmetric materials. By means of Monte Carlo simulations, we theoretically study the frustrated J1-J2classical Heisenberg model on the triangular lattice. Both h-J2 and h-T phase diagrams show rich magnetic phases, and skyrmion state can be stabilized by J2. These results can be qualitatively explained by energy competitions, and indicate that skyrmion can be driven by the competition of short-range interactions in absence of DM interaction. This may help us to design and apply the skyrmion devices more easily in the future.

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Spin-wave-driven skyrmion dynamics in ferrimagnets: Effect of net angular momentum

Cited by 13 publications

References 52 publications

Magnon Hall effect

Magnon Hall effect

Skyrmion Motion in Ferrimagnets Driven by Magnetic Anisotropy Gradient

Skyrmion state stabilized by short-range interactions in centrosymmetric materials

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