Propagation of Spin Waves in a 2D Vortex Network

Li, Zhenghua; Dong, Bin; He, Yangyang; Chen, Aiying; Li, Xiang; Tian, Jing‐Hua; Yan, Chenglin

doi:10.1021/acs.nanolett.1c00971

Cited by 11 publications

(11 citation statements)

References 58 publications

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“…However, the spin-wave excitation efficiency of nanoantennas is greatly reduced due to the scaling and the increase in Ohmic resistance. Recently, several other methods have been developed for the excitation of short-wavelength exchange spin waves, e.g., using magnonic grating couplers [6], magnetic vortex cores [7,27], parametric pumping [28,29], and geometry-induced wavenumber convertors [30,31]. Most of these methods, however, have drawbacks such as selective excitation wavelengths, complex spinwave emissions, relatively low excitation efficiency, or unrealistic integration.…”

Section: Introductionmentioning

confidence: 99%

Deeply nonlinear excitation of self-normalised exchange spin waves

Wang¹,

Verba²,

Heinz³

et al. 2022

Preprint

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Spin waves are ideal candidates for wave-based computing, but the construction of magnetic circuits is blocked by a lack of an efficient mechanism to excite long-running exchange spin waves with normalised amplitudes. Here, we solve the challenge by exploiting the deeply nonlinear phenomena of forward-volume spin waves in 200 nm wide nanoscale waveguides and validate our concept with microfocused Brillouin light scattering spectroscopy. An unprecedented nonlinear frequency shift of >2 GHz is achieved, corresponding to a magnetisation precession angle of 55° and enabling the excitation of exchange spin waves with a wavelength of down to ten nanometres with an efficiency of >80%. The amplitude of the excited spin waves is constant and independent of the input microwave power due to the self-locking nonlinear shift, enabling robust adjustment of the spin wave amplitudes in future on-chip magnonic integrated circuits.

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Section: Introductionmentioning

confidence: 99%

Deeply nonlinear excitation of self-normalised exchange spin waves

Wang¹,

Verba²,

Heinz³

et al. 2022

Preprint

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show abstract

“…[90] where domain walls were also suggested as reconfigurable spin-wave nanochannels. Excitation of Winter magnons via coupling to the vortex core was achieved in exchange-coupled ferromagnetic bilayers and has been suggested to be implemented for future spin-wave logic and computational circuits [91], [92], [93], [94]. element foreseen as an essential element for phase controlled ultrafast logics.…”

Section: G Steering Of Spin Waves Along Domain Walls and Structure Edgesmentioning

confidence: 99%

Advances in Magnetics Roadmap on Spin-Wave Computing

et al. 2022

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Magnonics addresses the physical properties of spin waves and utilizes them for data processing. Scalability down to atomic dimensions, operation in the GHz-to-THz frequency range, utilization of nonlinear and nonreciprocal phenomena, and compatibility with CMOS are just a few of many advantages offered by magnons. Although magnonics is still primarily positioned in the academic domain, the scientific and technological challenges of the field are being extensively investigated, and many proof-of-concept prototypes have already been realized in laboratories. This roadmap is a product of the collective work of many authors that covers versatile spin-wave computing approaches, conceptual building blocks, and underlying physical phenomena. In particular, the roadmap discusses the computation operations with Boolean digital data, unconventional approaches like neuromorphic computing, and the progress towards magnon-based quantum computing. The article is organized as a collection of sub-sections grouped into seven large thematic sections. Each sub-section is prepared by one or a group of authors and concludes with a brief description of current challenges and the outlook of further development for each research direction.

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“…和增强磁子之间的耦合作用 [31,32,145] . 磁畴壁是一种常见的非均匀磁结构, 其内部存在束缚态自旋波模式, 可作为自旋波传播的波导 [16,17] . 磁畴壁构型体系的哈密顿量也包含磁子算符的三阶项:…”

Section: 此外非均匀磁结构也可以诱导出三磁子过程unclassified

Topological states and quantum effects in magnonics

Wang¹,

Li²,

Huai-Yang³

et al. 2023

Acta Phys. Sin.

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In recent years, with the rapid development of the emerging technologies including the Internet of Things, cloud computing, big data, artificial intelligence and 5G, higher computing power is required. Traditional semiconductor devices are confronting the huge challenges brought by device miniaturization, energy consumption, heat dissipation, and so on. Moore.s law which succeeds in guiding downscaling and upgrading of microelectronics is nearing its end. A new information carrier is urgent need for information transmission and processing instead of electrons. Spin waves are collective excitations in ordered magnets and quantized as magnons. The propagation of magnons does not involve the electron motion and produces no Joule heating, which can overcome the increasing significant issue of heating dissipation in electronic devices. Thus, magnon-based devices have important application prospect in low-power information storage and computing. In this review, we first introduce the recent advances in the excitation, propagation, manipulation, detection of spin waves and magnon-based devices. Then, we mainly discussed the works from our group to inspire more possibilities in this area. This part is described from four aspects: (1) chiral magnonics, including the chiral propagarion of magnetostatic spin waves, DMI-induced nonreciprocity of spin waves, spin-wave propagation at chiral interface, magnonic Goos-Hänchen effect, spin-wave lens, and magnonic Stern-Gerlach effect; (2) nonlinear magnonics, including three-magnon processes induced by DMI and noncollinear magnetic textures, skyrmion-induced magnonic frequency comb, twisted magnon frequency and Penrose superradiance; (3) topological magnonics, including magnon Hall effect, magnonic topological insulator, magnonic topological semimetal, topological edge states and highorder corner states of magnetic solitons arranged in different crystal lattices; (4) quantum magnonics, including quantum states of magnon, magnon-based hybrid quantum systems, and cavity magnonics. Finally, the future development and prospect of magnonics are analyzed and discussed.

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Propagation of Spin Waves in a 2D Vortex Network

Cited by 11 publications

References 58 publications

Deeply nonlinear excitation of self-normalised exchange spin waves

Deeply nonlinear excitation of self-normalised exchange spin waves

Advances in Magnetics Roadmap on Spin-Wave Computing

Topological states and quantum effects in magnonics

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