Magnetic domain walls displacement: Automotion versus spin-transfer torque

Chauleau, Jean‐Yves; Weil, Raphaël; Thiaville, A.; Miltat, J.

doi:10.1103/physrevb.82.214414

Cited by 65 publications

(72 citation statements)

References 37 publications

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“…Controlling DW position under spinpolarized currents and/or with PMA materials can be achieved using pinning from geometric features [2,12,31,32]. Recent experiments [33,34] of DW dynamics including relaxation and transformational behaviour with spin-polarized currents have also shown interesting inertial-like propagation of DWs.…”

Section: Basic Observationsmentioning

confidence: 99%

Nanowire spintronics for storage class memories and logic

Hrkac

Dean

Allwood

2011

Phil. Trans. R. Soc. A.

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Patterned magnetic nanowires are extremely well suited for data storage and logic devices. They offer non-volatile storage, fast switching times, efficient operation and a bistable magnetic configuration that are convenient for representing digital information. Key to this is the high level of control that is possible over the position and behaviour of domain walls (DWs) in magnetic nanowires. Magnetic random access memory based on the propagation of DWs in nanowires has been released commercially, while more dynamic shift register memory and logic circuits have been demonstrated. Here, we discuss the present standing of this technology as well as reviewing some of the basic DW effects that have been observed and the underlying physics of DW motion. We also discuss the future direction of magnetic nanowire technology to look at possible developments, hurdles to overcome and what nanowire devices may appear in the future, both in classical information technology and beyond into quantum computation and biology.

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Section: Basic Observationsmentioning

confidence: 99%

Nanowire spintronics for storage class memories and logic

Hrkac

Dean

Allwood

2011

Phil. Trans. R. Soc. A.

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“…Zero displacements are also observed, meaning that sometimes the DW is pinned or the displacement is smaller than the optical resolution of 1 µm. Small displacements can also take place by auto-motion, where a structural change of the DW by STT leads to a DW displacement by itself [35], an effect also called DW inertia [36]. For [Co/Ni], using the DW width and damping quoted above, this auto-motion is estimated around 1 µm.…”

Section: The Combined Effect Of Magnetic Field and Current On Domain mentioning

confidence: 99%

Effect of spin transfer torque on domain wall motion regimes in [Co/Ni] superlattice wires

et al. 2017

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“…It is also interesting to evaluate the DW dynamics once the current pulse is turned off. The current-driven DW dynamics due to their own inertia has been studied in systems with in-plane magnetization by Thomas et al 31 and Chauleau et al 32 , where the DW motion when the current pulse was turned off was essentially ascribed to the gyrotropic dynamics of the vortex DW configurations. Vogel et al 33 shown that the DW motion induced by nanosecond current pulses in Pt/Co/AlOx multilayers with perpendicular magnetic anisotropy exhibits negligible inertia.…”

Section: 1c Inertia Effect On the Current-driven Dw Motionmentioning

confidence: 99%

Current-driven domain wall dynamics in ferromagnetic layers synthetically exchange-coupled by a spacer: A micromagnetic study

Alejos

Raposo

Sánchez-Tejerina

et al. 2018

Journal of Applied Physics

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The current-driven domain wall motion along two exchange-coupled ferromagnetic layers with perpendicular anisotropy is studied by means of micromagnetic simulations and compared to the conventional case of a single ferromagnetic layer. Our results, where only the lower ferromagnetic layer is subjected to the interfacial Dzyaloshinskii-Moriya interaction and to the spin Hall effect, indicate that the domain walls can be synchronously driven in the presence of a strong interlayer exchange coupling, and that the velocity is significantly enhanced due to the antiferromagnetic exchange coupling as compared with the single-layer case. On the contrary, when the coupling is of ferromagnetic nature, the velocity is reduced. We provide a full micromagnetic characterization of the current-driven motion in these multilayers, both in the absence and in the presence of longitudinal fields, and the results are explained based on a one-dimensional model. The interfacial DzyaloshinskiiMoriya interaction, only necessary in this lower layer, gives the required chirality to the magnetization textures, while the interlayer exchange coupling favors the synchronous movement of the coupled walls by a dragging mechanism, without significant tilting of the domain wall plane. Finally, the domain wall dynamics along curved strips is also evaluated.These results indicate that the antiferromagnetic coupling between the ferromagnetic layers mitigates the tilting of the walls, which suggest these systems to achieve efficient and highlypacked displacement of trains of walls for spintronics devices. A study, taking into account defects and thermal fluctuations, allows to analyze the validity range of these claims.2

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Magnetic domain walls displacement: Automotion versus spin-transfer torque

Cited by 65 publications

References 37 publications

Nanowire spintronics for storage class memories and logic

Nanowire spintronics for storage class memories and logic

Effect of spin transfer torque on domain wall motion regimes in [Co/Ni] superlattice wires

Current-driven domain wall dynamics in ferromagnetic layers synthetically exchange-coupled by a spacer: A micromagnetic study

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