Spin-wave mediated interactions for majority computation using Skyrmions and spin-torque nano-oscillators

Miriyala, Venkata Pavan Kumar; Zhu, Zhifeng; Liang, Gengchiau; Fong, Xuanyao

doi:10.1016/j.jmmm.2019.165271

Cited by 5 publications

(2 citation statements)

References 39 publications

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“…As it follows from our micromagnetic simulation, these condition lead to reduction of skyrmion size and larger distance r c between the skyrmion centers. According to equation (7), the increase of current density slows the skyrmions down [40]. Therefore, the relationship between frequency and J is non-linear and inversely-proportional [41].…”

Section: The Effect Of Current Densitymentioning

confidence: 99%

“…Due to its nontrivial topological charge [1,2], the skyrmion is topologically protected and can be driven by spin-transfer torque (STT) at ultralow current densities, promising perspectives for information transfer in next-generation information storage and spintronics devices including memory circuit * Authors to whom any correspondence should be addressed. [3,4], a microwave detector [5], and spin torque nanooscillators (STNOs) [6,7]. The output frequency of STNOs is in the microwave frequency range (0.1-100 GHz) and can be varied in wide ranges by applying an external magnetic field and injecting a spin-polarized current [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of magnetic system formed by two semi-skyrmions in circular nano-pillars with a perpendicular anisotropy

Zhang¹,

Hou²,

Zhang³

et al. 2022

J. Phys. D: Appl. Phys.

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Magnetic skyrmion has the advantages of stable topology and small volume. Many researchers choose different materials or build double-free layers to achieve their goals to apply it to spin-torque nano-oscillator that can output high frequency. In this paper, the dynamics of the two semi-skyrmions in circular nano-pillar oscillators with perpendicular magnetic anisotropy (PMA) free layer and spin polarizer are studied through micromagnetic simulation. the oscillation frequency of two semi-skyrmions is much higher than that of the single-semi-skyrmion, which is more than twice that of the single-semi-skyrmion. In addition, we also explore the influences of different parameters (current density, damping coefficient, anisotropy constant, and temperature) on the motion of two semi-skyrmions motion. The results shown in the damping coefficient and the exchange constant have great influences on the oscillation frequency.

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Section: The Effect Of Current Densitymentioning

confidence: 99%