Deeply nonlinear excitation of self-normalized short spin waves

Wang, Qi; Verba, Roman; Heinz, Björn; Schneider, Michael; Wojewoda, Ondřej; Davídková, Kristýna; Levchenko, Khrystyna; Dubs, Carsten; Mauser, Norbert J.; Urbánek, Michal; Pirro, Philipp; Chumak, Andrii V.

doi:10.1126/sciadv.adg4609

Cited by 16 publications

(3 citation statements)

References 49 publications

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“…Finally, it is essential to discuss the feasibility of observing ultra-slow spin wave propagation under current experimental conditions. One can locally inject a spin wave in a chiral ferromagnetic thin film hosting skyrmions, and then the spin-wave group velocity can be measured and analyzed by utilizing time-resolved microfocused Brillouin light scattering spectroscopy [34,49]. In addition, the variable parameters discussed in the numerical simulation can also be controlled in real samples.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, it is expected to be used as a next-generation information carrier in the development of spintronic devices and integrated circuits, which has the advantages of high speed, high density, and low energy dissipation [28]. Recently, the spin wave-skyrmion interactions have attracted more and more attentions and progressed enormously, for instance, the nonlinear scattering processes between the skyrmion excitation and magnons [29][30][31], the magnonic frequency combs based on nonlinear magnon-skyrmion scattering [32], the forward and transient retrograde motion of spin wave driven skyrmions [33], and the deeply nonlinear excitation of short spin waves [34]. The study of magnetic skyrmion, therefore, not only reveals fundamentally new physics, but also has great technical prospects [35].…”

Section: Introductionmentioning

confidence: 99%

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Ultra-slow spin waves propagation based on skyrmion breathing

Liu,

Xiong

2023

New J. Phys.

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Spin wave has attracted significant attention in various fields because of its rich physics and potential applications in the development of spintronics devices in the post-Moore era. However, the analog of a subluminal-like propagation in the field of spin waves has not been well discussed. Here, we theoretically demonstrate the ultra-slow spin waves propagation in a nanoscale two-dimensional ferromagnetic film in the presence of magnon-skyrmion interaction. The minimum spin waves propagation velocity was estimated to be as low as 1.8 m/s by adjusting the system parameters properly, and the spin waves group delay and advance are dynamically tunable via the intensity or detuning of the control field, which allows the possibility of observing superluminal- and subluminal-like spin waves propagation in a single experimental setup. These results deepen our understanding of the spin wave-skyrmion interactions, open a novel and efficient pathway to realize ultra-slow spin waves propagation, and are expected to be applied to magnetic information storage and quantum operations of magnons.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultra-slow spin waves propagation based on skyrmion breathing

Liu,

Xiong

2023

New J. Phys.

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“…if the gain depends on the incoming spin-wave signal. In this context, magnonic bistabilitites [58] can provide an interesting option. If an incoming spinwave signal overcomes the threshold to switch the bistability into its high amplitude state, the signal is amplified but the outgoing spin-wave intensity, frequency and phase are independent of the incoming signal intensity and frequency.…”

Section: Advances In Science and Technology To Meet Challengesmentioning

confidence: 99%

The 2024 magnonics roadmap

Flebus,

Grundler,

Rana

et al. 2024

J. Phys.: Condens. Matter

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Magnonics is a research field that has gained an increasing interest in both the fundamental and applied sciences in recent years. This field aims to explore and functionalize collective spin excitations in magnetically ordered materials for modern information technologies, sensing applications, and advanced computational schemes. Spin waves, also known as magnons, carry spin angular momenta that allow for the transmission, storage, and processing of information without moving charges. In integrated circuits, magnons enable on-chip data processing at ultrahigh frequencies without the Joule heating, which currently limits clock frequencies in conventional data processors to a few GHz. Recent developments in the field indicate that functional magnonic building blocks for in-memory computation, neural networks, and Ising machines are within reach. At the same time, the miniaturization of magnonic circuits advances continuously as the synergy of materials science, electrical engineering, and nanotechnology allows for novel on-chip excitation and detection schemes. Such circuits can already enable magnon wavelengths of 50 nm at microwave frequencies in a 5G frequency band. Research into non-charge-based technologies is urgently needed in view of the rapid growth of machine learning and artificial intelligence applications, which consume substantial energy when implemented on conventional data processing units. In its first part, the 2024 Magnonics Roadmap provides an update on the recent developments and achievements in the field of nano-magnonics while defining its future avenues and challenges. In its second part, the Roadmap addresses the rapidly growing research endeavors on hybrid structures and magnonics-enabled quantum engineering. We anticipate that these directions will continue to attract researchers to the field and, in addition to showcasing intriguing science, will enable unprecedented functionalities that enhance the efficiency of alternative information technologies and computational schemes.

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Exciting High‐Frequency Short‐Wavelength Spin Waves using High Harmonics of a Magnonic Cavity Mode

Kumar,

Gruszecki,

Gołębiewski

et al. 2024

Adv Quantum Tech

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Spin waves (SWs) are promising objects for signal processing and future quantum technologies due to their high microwave frequencies with corresponding nanoscale wavelengths. However, the nano‐wavelength SWs generated so far are limited to low frequencies. In the paper, using micromagnetic simulations, it is shown that a microwave‐pumped SW mode confined to the cavity of a thin film magnonic crystal (MC) can be used to generate waves at tens of GHz and wavelengths well below 50 nm. These multi‐frequency harmonics of the fundamental cavity mode are generated when the amplitude of the pumping microwave field exceeds a threshold, and their intensities then scale linearly with the field intensity. The frequency of the cavity mode is equal to the ferromagnetic resonance frequency of the planar ferromagnetic film, which overlaps with the magnonic bandgap, providing an efficient mechanism for confinement and magnetic field tunability. The effect reaches saturation when the microstrip feed line covers the entire cavity, making the system feasible for realization.

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Deeply nonlinear excitation of self-normalized short spin waves

Cited by 16 publications

References 49 publications

Ultra-slow spin waves propagation based on skyrmion breathing

Ultra-slow spin waves propagation based on skyrmion breathing

The 2024 magnonics roadmap

Exciting High‐Frequency Short‐Wavelength Spin Waves using High Harmonics of a Magnonic Cavity Mode

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