Spin transfer torque driven skyrmion motion
WebJan 1, 2024 · Two main mechanisms to drive the skyrmion motion have been deeply analyzed: the spin-transfer torque (STT) [10], [11] and the spin-Hall effect (SHE) [12], [13], [14], [15], [16], [17]. Although both torques rise when an in-plane electrical current flows into the system, they have a different origin and effect on the skyrmion motion. WebIn chiral magnets, localized topological magnetic whirls, magnetic skyrmions, can be moved by spin polarized electric currents. Upon increasing the current strength, with prospects for high-speed skyrmion motion for spintronics applications in mind, isolated skyrmions deform away from their typical circular shape. We analyze the influence of spin-transfer torques …
Spin transfer torque driven skyrmion motion
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http://physics.bu.edu/~okctsui/PY105%20Lecture_notes/Notes/class27_Newton WebOct 25, 2024 · In this article, we present a numerical study on stabilization and eigenmodes of the so-called skyrmion chiral spin texture in nanometric dots. The first aim of this study is to identify the appropriate multilayer in a set of Pt/Co/MgO structures with different Co thicknesses that have been previously experimentally characterized. Stabilization occurs …
WebMar 19, 2024 · Current-driven skyrmion motion experiments and simulations reveal that the skyrmions move along the irradiated track, resulting in the suppression of the skyrmion Hall effect, and that the maximum skyrmion velocity can … WebApr 11, 2024 · It is found that the skyrmion can pass through the voltage gate at J spin = − 20 MA / c m 2, but is pinned at J spin = − 10 MA / c m 2, exhibited in Figs. 2(d) and 2(f). The reasons for the variation of skyrmion velocity at different stages when skyrmion passing through different voltage gates are shown in the Figs. S2–S4 in the ...
WebMar 1, 2014 · The finding that a topologically nontrivial spin texture known as a skyrmion--a particle-like object in which spins point in all directions to wrap a sphere--constitutes such a ratchet is reported, suggesting that magnons can be used to … WebNov 24, 2024 · Driving and controlling single-skyrmion motion promises skyrmion-based spintronic applications. Recently progress has been made in moving skyrmionic bubbles …
WebDec 17, 2010 · The spin transfer torques appear when the current density exceeds an ultralow threshold of ∼10 6 A m −2, five orders of magnitude smaller than those used typically in experimental studies on current-driven magnetization dynamics in ferromagnetic metals and semiconductors.
Webvery similar formula relating torque and angular acceleration: ¿ = Ifi (10:7) This is closely related to Newton’s second law where on the right hand side we are using the rotational … fezbnWebMar 25, 2024 · However, when the skyrmion is driven by an in-plane current via the spin transfer torque, the trajectory of its motion deviates from the current direction due to the intrinsic skyrmion Hall effect [2, 3, 27–30]. Furthermore, there exists a threshold current density above which skyrmions can annihilate at the film edge . This edge effect ... fez boxWebspin-transfer torque. The electric field gradient causes a motion of the skyrmion along ... is driven by spin-transfer torques and inhomogenous electric fields) and spin torque os- ... Before deriving the equations of motion for the skyrmion from the Thiele equation, we briefly discuss the structure, symmetries and dynamical properties of the fez borseWebJul 11, 2014 · We study by the micromagnetic simulations the skyrmion motion along the edge driven by the current transverse to it. We found that (i) the velocity is enhanced by the factor of ∼1/α (α: the Gilbert damping) with the maximum value determined only by the confining force from the edge, (ii) the inertia appear due to the confining potential with the … fez boxesWebAug 13, 2014 · We study by the micromagnetic simulations the skyrmion motion along the edge driven by the current transverse to it. We found that (i) the velocity is enhanced by the factor of ∼ 1/α (α: the Gilbert damping) with the maximum value determined only by the confining force from the edge, (ii) the inertia appear due to the confining potential with the … hp murah ada nfc 2022WebAug 9, 2003 · While this is true for spin-transfer torque-driven skyrmions, we show that this simple picture is generally false for spin-orbit torque-driven objects [7]. We find that the skyrmion Hall angle for spin-orbit torque-driven skyrmions is directly related to their helicity, which imposes an unexpected roadblock for developing faster and lower input ... hp murah ada nfcWebWe propose a skyrmion-based cache memory where data can be stored in a long nanotrack as multiple bits. Write operation (formation of skyrmion) can be achieved by injecting spin polarized current in a magnetic nanotrack and subsequently shifting the MS in either direction along the nanotrack using charge current through a spin-Hall metal (SHM ... fezbq