Bistable behavior of active ring resonator on surface spin waves

Vitko, V. V.; Никитин, А. А.; Haponchyk, Roman V.; Stashkevich, A. A.; Kostylev, Mikhail; Устинов, А. Б.

doi:10.1140/epjp/s13360-022-03213-5

Cited by 5 publications

(2 citation statements)

References 84 publications

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“…Information can be transferred in diverse magnetic materials, including insulators, in the form of a spin wave [1][2][3]. Investigations of a wide variety of linear [4][5][6] and nonlinear [7][8][9] spin-wave phenomena address the field of science known as magnonics. The promising building blocks for magnonic devices are constituted by artificial spatially periodic magnetic media, known as magnonic crystals [10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Dynamic electromagnonic crystals based on ferrite-ferroelectric thin film multilayers

Nikitin,

Kuznetsov,

van Dijken

et al. 2024

Phys. Rev. B

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Magnons, the quanta of the oscillations of localized electron spins, are a powerful tool for information transport and processing of microwave signals. Owing to the challenge of energy efficient spin-wave control on small time-and space scales, dynamic magnonic crystals have been proposed. Their distinct feature is the possibility to toggle on and off the spatial periodicity of the magnetic waveguide that allows one to realize the unusual signal processing functions. The miniaturization of magnonic circuits, reduction in energy consumption, and fast operation are important possibilities of these artificial crystals. These can be achieved in ferrite-ferroelectric (multiferroic) heterostructures, where strong coupling of magnons and microwave photons constitutes quasiparticles called electromagnons. Using both a theoretical approach and microwave measurements, we report on successful dynamic control of electromagnonic band structures in artificial thin film crystals via application of a voltage to the grid electrode located on a ferroelectric film.A promising functionality of the proposed waveguiding structures arises from two major factors: (i) low energy consumptions due to the thin ferroelectric layer, and (ii) pronounced rejection bands caused by a gradual change of the dielectric permittivity.

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Section: Introductionmentioning

confidence: 99%

Dynamic electromagnonic crystals based on ferrite-ferroelectric thin film multilayers

Nikitin,

Kuznetsov,

van Dijken

et al. 2024

Phys. Rev. B

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“…Типичный график, показывающий сдвиг исследуемого резонансного пика, приведен на рис. 2, a. Видно, что нелинейных искажений формы резонансной кривой не происходило, как в случае бистабильности [22]. С возрастанием мощности сигнала накачки уменьшалась амплитуда резонансного пика.…”

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Наведенный Нелинейный Сдвиг Частоты Активного Кольцевого Резонатора На Магнонном Кристалле

Багаутдинов,

Устинов

2023

Письма В Журнал Технической Физики

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The nonlinear shift of the resonant frequencies of a microwave active ring resonator (ARR) induced by a pump wave has been studied for the first time. The resonator was designed according to the scheme in the form of a closed ring containing a spin-wave delay line made on the basis of a one-dimensional magnonic crystal, as well as a microwave amplifier in a feedback circuit. It is shown, that with an increase in the power of the pumping wave, the shift of the resonant frequencies of the ARR increases in different ways depending on the position of the pumping frequency. The maximum induced nonlinear frequency shift is observed if the pumping frequency is at the minimum of the ARR transmission coefficient. A model describing the studied effect is developed.

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Nonlinear chiral magnonic resonators: Toward magnonic neurons

Fripp

Shytov

et al. 2023

Applied Physics Letters

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We explore chiral magnonic resonators as building blocks of artificial neural networks. Via micromagnetic simulations and analytical modeling, we demonstrate that the spin-wave modes confined in the resonators exhibit a strongly nonlinear response owing to energy concentration when resonantly excited by incoming spin waves. This effect may be harnessed to implement an artificial neuron in a network. Therefore, the confined and propagating spin-wave modes can serve as neurons and interneural connections, respectively. For modest excitation levels, the effect can be described in terms of a nonlinear shift of the resonant frequency (“detuning”), which results in amplitude-dependent transmission of monochromatic spin waves, which may be harnessed to recreate a “sigmoid-like” activation function. At even stronger excitation levels, the nonlinearity leads to bistability and hysteresis, akin to those occurring in nonlinear oscillators when the excitation strength exceeds a threshold set by the decay rate of the mode. In magnonic resonators, the latter includes both the Gilbert damping and the radiative decay due to the coupling with the medium. The results of our simulations are well described by a phenomenological model in which the nonlinear detuning of the confined mode is quadratic in its amplitude, while the propagation in the medium is linear.

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Bistable behavior of active ring resonator on surface spin waves

Cited by 5 publications

References 84 publications

Dynamic electromagnonic crystals based on ferrite-ferroelectric thin film multilayers

Dynamic electromagnonic crystals based on ferrite-ferroelectric thin film multilayers

Наведенный Нелинейный Сдвиг Частоты Активного Кольцевого Резонатора На Магнонном Кристалле

Nonlinear chiral magnonic resonators: Toward magnonic neurons

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