Spin Currents and Nonlinear Dynamics of Vortex Spin Torque Nano-Oscillators

Zvezdin, K. A.; Екомасов, Е. Г.

doi:10.1134/s0031918x22030140

Cited by 13 publications

(12 citation statements)

References 111 publications

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“…Vortex spin torque nano-oscillators (STNOs) are threelayer nanodisks in which the magnetic layers (one or both) contain a magnetic vortex [1]. Interest in the study of vortex STNOs is associated with great prospects for their practical applications and some advantages over conventional STNOs [1, 2 -5].…”

Section: Introductionmentioning

confidence: 99%

“…Interest in the study of vortex STNOs is associated with great prospects for their practical applications and some advantages over conventional STNOs [1, 2 -5]. In vortex STNOs, a high microwave signal power and a relatively narrow line width were achieved [1]. There are different types of magnetic vortices.…”

Section: Introductionmentioning

confidence: 99%

“…There are different types of magnetic vortices. In addition to the usual circular vortex and anti-vortex, there is also known a radial vortex and a curled vortex [1,6]. The magnetic structure of the circular vortex located in the center of the disk under equilibrium conditions looks qualitatively as follows: the magnetization field lies in a plane and twists around the center of the vortex.…”

Section: Introductionmentioning

confidence: 99%

“…This central part is called the core of the vortex and has a diameter of about 10 nm. It is known that in permalloy nanodisks a magnetic circular vortex can be realized as the ground state [1,2]. A special C-state when vortex is partially "squeezed" out of the diskhas been demonstrated [5].…”

Section: Introductionmentioning

confidence: 99%

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Influence of the thickness of a nonmagnetic layer on the coupled dynamics of magnetic vortices in a spin-transfer nanooscillator

et al. 2022

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A spin torque nano-oscillator in the form of a three-layer magnetic tunneling junction of small diameter (120 nm), where the magnetizations in both magnetic layers are in vortex state, is considered. The effect of the thickness of a nonmagnetic layer on the coupled dynamics of two magnetic vortices in a spin torque nano-oscillator has been studied. The thick permalloy magnetic layer has a thickness of 15 nm, the middle non-magnetic layer has a thickness in the first case of 12.5 and in the second 15 nm, and the thin permalloy magnetic layer has a thickness of 4 nm. Numerical calculation of the dynamics of magnetostatically coupled vortices was carried out using the software package SpinPM for micromagnetic modeling. The features of the vortex motion dynamic are studied for different thicknesses of the nonmagnetic interlayer. It is shown that in all cases of thickness of the nonmagnetic interlayer, three regimes of vortex dynamics are observed: the oscillations of magnetic vortices damped over time, the mode of stationary coupled oscillations of magnetic vortices, and regime, when vortices "leave" the edge of the disk. It is found that increasing in the thickness of the nonmagnetic layer leads to decreasing in the values of the first, second, and third critical currents.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of the thickness of a nonmagnetic layer on the coupled dynamics of magnetic vortices in a spin-transfer nanooscillator

et al. 2022

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“…УДК 517.9., 519.633 DOI: 10.33184/fmpve2022-2022-10-19.29 ВЛИЯНИЕ ТОЛЩИНЫ НЕМАГНИТНОГО СЛОЯ НА ВЕЛИЧИНЫ КРИТИЧЕСКИХ ТОКОВ В ВИХРЕВОМ СПИН-ТРАНСФЕРНОМ НАНООСЦИЛЯТОРЕ Мухамадеева В.В., Степанов С.В., Екомасов Е.Г. Башкирский государственный университет, г. Уфа, Россия В настоящее время одним из перспективных технических устройств для спинтроники является вихревой спин-трансферный наноосциллятор (СТНО) [1][2][3]. В его основе лежат мультислойные наностолбики, которые имеют два пермаллоевых магнитных слоя различной толщины, разделенных немагнитной прослойкой [3].…”

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