Autoresonance in a ferromagnetic film

Шамсутдинов, М. А.; Kalyakin, L. A.; Kharisov, A. T.

doi:10.1134/s1063784210060198

Cited by 12 publications

(12 citation statements)

References 13 publications

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“…Some authors also noticed the beneficial effect of a chirped pulse on the magnetization dynamics in a nanoparticle [24][25][26], but lacked the analytical tools provided by the autoresonance theory. The autoresonance theory was used in the past to study the excitation of high-amplitude magnetization precession in ferromagnetic thin films [27] and the dynamics of localized magnetic inhomogeneities in a ferromagnet [28]. However, those authors did not investigate realistic physical systems and their analysis remained very abstract.…”

Section: Introductionmentioning

confidence: 99%

Autoresonant control of the magnetization switching in single-domain nanoparticles

Klughertz¹,

Hervieux

Manfredi

2014

J. Phys. D: Appl. Phys.

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The ability to control the magnetization switching in nanoscale devices is a crucial step for the development of fast and reliable techniques to store and process information. Here we show that the switching dynamics can be controlled efficiently using a microwave field with slowly varying frequency (autoresonance). This technique allowed us to reduce the applied field by more than 30% compared to competing approaches, with no need to fine-tune the field parameters. For a linear chain of nanoparticles the effect is even more dramatic, as the dipolar interactions tend to cancel out the effect of the temperature. Simultaneous switching of all the magnetic moments can thus be efficiently triggered on a nanosecond timescale. * Electronic address: manfredi@unistra.fr

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Section: Introductionmentioning

confidence: 99%

Autoresonant control of the magnetization switching in single-domain nanoparticles

Klughertz¹,

Hervieux

Manfredi

2014

J. Phys. D: Appl. Phys.

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“…Пленка ЖИГ была смоделирована в виде матрицы из элементарных ячеек размером 30×30×15 нм 3 . Взаимодействия между ячейками рассчитывали с помощью уравнения Ландау-Лифшица [5]. В качестве материальных констант были выбраны следующие параметры для ЖИГ: M s = 139261 А/м -намагниченность насыщения;…”

Section: постановка задачи и методы решенияunclassified

“…Для этого с заданной скоростью модулируется частота внешнего возбуждающего переменного магнитного поля, при этом возбуждаемые колебания в твердом теле должны возникать на той же частоте, независимо от собственного спектра. Также этот процесс можно использовать для эффективного возбуждения и исследования различных солитонных состояний [3][4][5].…”

Section: Introductionunclassified

Micromagnetic Modeling of Magnetization Autoresonance in Yig Thin Films With Induced Uniaxial Anisotropy

Teplov¹,

Bessonov²

2018

DREAM

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One of the main tasks of both magnonics and physics of nonlinear processes on the search for ways of exciting efficiently magnetic oscillations in solids is discussed. According to the earlier developed theoretical predictions, the MuMax3 software is used to carry out a micromagnetic simulation of a nonlinear effect of strong autoresonance amplifying of the amplitude of magnetic oscillations in yttrium-iron garnet under the action of an external excitation field. It is shown that the efficiency of this autoresonance excitation in thin films of ferrimagnetic yttrium-iron garnet nonlinearly depends on the power of the exciting field and the rate of change (scanning) of the exciting frequency. Both the rate of change and power of the exciting frequency are estimated with the aim of direct experimental observation of the autoresonance effect, in view of the real parameters of the yttrium-iron garnet film at room temperature.

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“…In recent years, autoresonance ideas were also implemented in magnetics. Examples are autoresonant waves in magnetic materials [17,18], the switching of magnetization of single domain point-like nanoparticles [19,20], and most recently the autoresonant excitation of large amplitude standing magnetization waves in long ferromagnetic nanowires by using rotating driving fields with short wavelength spatial modulations [21]. This recent approach required two resonant stages, where in the first stage one excites a rotating, but uniform magnetization of the wire, while later, in the second resonant stage, the system develops a spatially modified standing wave profile.…”

Section: Introductionmentioning

confidence: 99%

Narrow autoresonant magnetization structures in finite-length ferromagnetic nanoparticles

Shagalov

Frièdland

2019

Phys. Rev. E

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The autoresonant approach to excitation and control of large amplitude uniformly precessing magnetization structures in finite length easy axis ferromagnetic nanoparticles is suggested and analyzed within the Landau-Lifshitz-Gilbert model. These structures are excited by using a spatially uniform, oscillating, chirped frequency magnetic field, while the localization is imposed via boundary conditions. The excitation requires the amplitude of the driving oscillations to exceed a threshold. The dissipation effect on the threshold is also discussed. The autoresonant driving effectively compensates the effect of dissipation, but lowers the maximum amplitude of the excited structures. Fully nonlinear localized autoresonant solutions are illustrated in simulations and described via an analog of a quasi-particle in an effective potential. The precession frequency of these solutions is continuously locked to that of the drive, while the spatial magnetization profile approaches the soliton limit when the length of the nanoparticle and the amplitude of the excited solution increase.I.

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Autoresonance in a ferromagnetic film

Cited by 12 publications

References 13 publications

Autoresonant control of the magnetization switching in single-domain nanoparticles

Autoresonant control of the magnetization switching in single-domain nanoparticles

Micromagnetic Modeling of Magnetization Autoresonance in Yig Thin Films With Induced Uniaxial Anisotropy

Narrow autoresonant magnetization structures in finite-length ferromagnetic nanoparticles

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