Strain-driven magnetic domain wall dynamics controlled by voltage in multiferroic heterostructures

Yu, Guoliang; Shi, Shengbin; Peng, Rui; Guo, Rongdi; Qiu, Yang; Wu, Guohua; Li, Yuanxun; Zhu, Mingmin; Zhou, Hao-Miao

doi:10.1016/j.jmmm.2022.169229

Cited by 12 publications

(6 citation statements)

References 41 publications

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“…In recent years, different topological magnetic structures such as domain walls [1][2][3], skyrmions [4][5][6][7], merons [8,9], bubbles [10], and vortexes [11,12] have been discovered in ferromagnetic thin-films. The emergence of these topological solitons is particularly important for the development of magnetic storage and spintronic devices [13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Dynamic behavior of skyrmion collision: spiral and breath

Shi,

Zhao,

Sun

et al. 2023

New J. Phys.

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A magnetic skyrmion is a particle-like topological soliton, which is an ideal candidate for developing high-density storage and logic devices due to its nonvolatility and tunability. In view of the particle motion characteristics of skyrmion, different skyrmions in a material inevitably interact in the form of short-range repulsion and long-range attraction. In this work, the dynamic characteristics of skyrmion collision in a ferromagnetic Co thin film are investigated by using micromagnetic simulations. It is found that the dynamic behavior of skyrmion after collision is highly dependent on the size of the strip, the initial velocity of skyrmion and magnetic damping constant. For the collision of two skyrmions, when the strip width exceeds the critical value, the skyrmions form a pair and rotate counterclockwise in the form of spiral and breath. It is interesting that the rotation and breath of skyrmions keep the same periodicity under the negligible damping, and the frequency increases with the increase of the initial velocity of skyrmion. Further, the collision of a system of three skyrmions reveals that they interact in pairs to form closed periodic trajectories. The results of the present work not only give an insight into the multi-skyrmion dynamics, but also provide guidance for the development of spintronic devices based on multi-skyrmion motion.

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Section: Introductionmentioning

confidence: 99%

Dynamic behavior of skyrmion collision: spiral and breath

Shi,

Zhao,

Sun

et al. 2023

New J. Phys.

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“…Such systems are termed 'artificial multiferroics', due to their heterogeneous structure and show a variety of magnetic and DW driven phenomena [108]. Local variations in static strain across the length of a magnetostrictive nanowire create potential barriers or wells that can be used to addressably pin or even move DWs along the wire length [109,110]. Lei et al [111] have shown that by applying a static strain in piezoelectric/multilayer magnetic structures, the magnetic response can be reproducibly tuned (figure 5(b)).…”

Section: Dw Motionmentioning

confidence: 99%

Magnetic domain walls: types, processes and applications

Venkat,

Allwood,

Hayward

2023

J. Phys. D: Appl. Phys.

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Domain walls (DWs) in magnetic nanowires are promising candidates for a variety of applications including Boolean/unconventional logic, memories, in-memory computing as well as magnetic sensors and biomagnetic implementations. They show rich physical behaviour and are controllable using a number of methods including magnetic fields, charge and spin currents and spin-orbit torques. In this review, we detail types of domain walls in ferromagnetic nanowires and describe processes of manipulating their state. We look at the state of the art of DW applications and give our take on the their current status, technological feasibility and challenges.

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“…Recently, the effect of strain on the dynamics of magnetic DWs has been reported in several theoretical and experimental studies. It has been shown that, by optimizing the spatial profile of the strain, one can trigger magnetic DW motion along in-plane-magnetized strips [22][23][24][25]. Other work has shown that strain can be a useful tool to manipulate DW dynamics in perpendicularly magnetized films while they are driven by other means such as a magnetic field [26].…”

Section: Introductionmentioning

confidence: 99%

Absence of Walker Breakdown in the Dynamics of Chiral Néel Domain Walls Driven by In-Plane Strain Gradients

Fattouhi

García‐Sánchez²,

Yanes³

et al. 2022

Phys. Rev. Applied

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The influence of mechanical strain on the static and dynamic properties of chiral domain walls (DWs) in perpendicularly magnetized strips is investigated using micromagnetic simulations and a one-dimensional model. While a uniform strain allows one to reversibly switch the domain-wall configuration at rest between Bloch and Néel patterns, strain gradients are suggested as an energy-sustainable means to drive domain-wall motion without the need for magnetic fields or electrical currents. It is shown that an in-plane strain gradient creates a force on a domain wall that drives it towards a region of higher tensile (compressive) strain for materials with positive (negative) magnetostriction. Moreover, due to the dependence of the domain-wall internal energy on the in-plane strain, a damping torque proportional to the local strain arises during motion that opposes the precessional torque due to the driving force, which is proportional to the strain gradient. After a transient period, where both the internal DW angle and the velocity change nonmonotonically, reaching their maximum values asynchronously, the two torques balance each other. This compensation prevents the onset of turbulent domain-wall dynamics, and steady domain-wall motion with a constant velocity is asymptotically reached for an arbitrarily large strain gradient. Despite this complex dynamics, our work shows that average domain-wall velocities in the range of 500 m/s can be obtained using voltage-induced strain in piezoelectric/ferromagnetic devices under realistic conditions.

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Strain-driven magnetic domain wall dynamics controlled by voltage in multiferroic heterostructures

Cited by 12 publications

References 41 publications

Dynamic behavior of skyrmion collision: spiral and breath

Dynamic behavior of skyrmion collision: spiral and breath

Magnetic domain walls: types, processes and applications

Absence of Walker Breakdown in the Dynamics of Chiral Néel Domain Walls Driven by In-Plane Strain Gradients

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