Tunable microwave properties of a skyrmion in an isolated nanodisk

Paikaray, Bibekananda; Joseph, Aleena; Murapaka, Chandrasekhar; Haldar, Arabinda

doi:10.1016/j.jmmm.2021.167900

Cited by 14 publications

(9 citation statements)

References 36 publications

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“…To unravel the physics behind the motion of the skyrmion under the driving current and its stability over time in our logic device, we have estimated the skyrmion Hall angle. The forces that influence the skyrmion trajectory are described by Thiele’s formulation. − where G = −4 πQẑ represents the gyromagnetic coupling vector with a the topological charge of the skyrmion defined as Q = ( 1 / 4 π)∫ dxdym ·(∂ xm × ∂ym ) and v is the skyrmion velocity. The skyrmion experiences a Magnus force-like interaction ( G⃗ × v⃗ ) in which the skyrmion travels with a curved trajectory away from the direction of the current driven path.…”

Section: Resultsmentioning

confidence: 99%

Reconfigurable Logic Operations via Gate Controlled Skyrmion Motion in a Nanomagnetic Device

Paikaray

Kuchibhotla

Haldar

et al. 2022

ACS Appl. Electron. Mater.

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Owing to the topological protection and the ease of efficient manipulation, skyrmions have emerged as potential candidates for carrying information in future memory and logic devices. Here, we have proposed a reconfigurable skyrmion based two-input logic device architecture. Using micromagnetic simulations, we have demonstrated that the device is capable of performing both OR and AND logic gate functionalities in a reconfigurable manner. Different logic functionality of the device is selected by using a current through a nonmagnetic metallic gate, and the resultant Oersted field controls the trajectory of the skyrmion, which in turn determines the logic states. The logic functions are implemented on a ferromagnet/heavy metal bilayer device structure by virtue of several physical effects, such as the spin−orbit torque, skyrmion−edge repulsion, skyrmion−skyrmion topological repulsion, and skyrmion Hall effect. The skyrmion trajectory has been characterized by estimating the skyrmion Hall angle. A wide range of operations by varying the current density, skyrmion velocity, Dzyaloshinskii−Moriya interaction, magnetic anisotropy, and geometrical parameters have been presented in detail. We believe that our spin orbit torque driven logic design will have potential implications for a high-speed and low-power skyrmion based computing architecture.

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Section: Resultsmentioning

confidence: 99%

Reconfigurable Logic Operations via Gate Controlled Skyrmion Motion in a Nanomagnetic Device

Paikaray

Kuchibhotla

Haldar

et al. 2022

ACS Appl. Electron. Mater.

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“…[13] The resonant modes are related to the external static magnetic field and material parameters such as Dzyaloshinskii-Moriya interaction (DMI) constant, and perpendicular magnetic anisotropy (PMA) constant. [14][15][16] Recently, the skyrmion manipulated by using electrically generated mechanical strain has received much attention. [17,18] By considering the magnetoelastic coupling interaction, strain can be utilized to create skyrmions and annihilate skyrmions,and also modulate the configuration of stripe domains and skyrmions.…”

Section: Introductionmentioning

confidence: 99%

Tunable dispersion relations manipulated by strain in skyrmion-based magnonic crystals

Jin

et al. 2024

Chinese Phys. B

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In this paper, we theoretically investigated the propagation characteristics of spin waves in skyrmion-based magnonic crystals. It is found that the dispersion relations can be manipulated by strains through magneto-elastic coupling. Especially, the allowed bands and forbidden bands in dispersion relations shifted to higher frequency with changing strains from compressive to tensile, while shifting to lower frequency with changing strains from tensile to compressive. We also confirmed that the spin waves with specific frequencies could pass the magnonic crystal or be blocked by tuning the strains. The result provides an advanced platform for tunable skyrmion-based spin wave devices.

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“…However, reciprocal spin wave behaviors in magnetic systems with DMI are equally important for designing devices of isotropic spintronic applications. [17,18] Magnetic fields [19,20] and spin-polarized currents [21][22][23][24] have been used to regulate the resonant frequency effectively. Alternatively, strain engineering can be a powerful notion to control dynamics of magnetizations by the strain-mediated magnetoelastic coupling, which is particularly energy efficient and is known as "straintronics."…”

Section: Introductionmentioning

confidence: 99%

“…Magnetic fields [ 19,20 ] and spin‐polarized currents [ 21–24 ] have been used to regulate the resonant frequency effectively. Alternatively, strain engineering can be a powerful notion to control dynamics of magnetizations by the strain‐mediated magnetoelastic coupling, which is particularly energy efficient and is known as “straintronics.” [ 25–27 ] In practice, the strain in a real material system is inevitable due to the point defect, the interfacial mismatch, inhomogeneous thickness, and so on.…”

Section: Introductionmentioning

confidence: 99%

Reciprocal Ferromagnetic Resonant Behaviors Driven by Shear Strains in Isolated Skyrmions

Zhao

et al. 2023

Physica Rapid Research Ltrs

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Strain‐mediated magnetoelastic coupling provides a powerful way to manipulate the dynamics of magnetic textures because of its energy efficiency, which is promising for applications in spintronics. Herein, it is demonstrated that reciprocal ferromagnetic resonant behaviors can be induced in isolated skyrmions by applying inverse shear strains, physically originating from the symmetric deformations of skyrmions, which cannot exist in the ones induced by normal strains. A linear relationship between resonant frequencies (f) and shear strains (εxy) is given by f = ±24.4 × εxy + 0.03, where the symbols of + and − denote positive and negative shear strains, respectively. The resonant frequency increases from 0.1 to 0.98 GHz with the change of shear strains from −0.003 to −0.039 or from 0.003 to 0.039. The breathing mode is observed by profiles of temporal evolutions for dynamics of deformed skyrmions, ascribed to the applied microwave magnetic field along the out‐of‐plane direction. The proposed results can provide insight into controlling resonant frequencies by strain engineering.

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Tunable microwave properties of a skyrmion in an isolated nanodisk

Cited by 14 publications

References 36 publications

Reconfigurable Logic Operations via Gate Controlled Skyrmion Motion in a Nanomagnetic Device

Reconfigurable Logic Operations via Gate Controlled Skyrmion Motion in a Nanomagnetic Device

Tunable dispersion relations manipulated by strain in skyrmion-based magnonic crystals

Reciprocal Ferromagnetic Resonant Behaviors Driven by Shear Strains in Isolated Skyrmions

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