Domain-wall dynamics in magnetoelastic nanostripes

Mathurin, Théo; Giordano, Stefano; Dusch, Yannick; Tiercelin, Nicolas; Pernod, Philippe; Preobrazhensky, V.

doi:10.1103/physrevb.95.140405

Cited by 13 publications

(11 citation statements)

References 45 publications

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“…For these reasons, new possibilities are still being explored. Recent progress includes making use of voltage [21], temperature gradient [22][23][24][25][26][27][28], mechanical stress [29,30], laser pulses [31], spin waves (SWs) [32][33][34][35][36][37][38][39][40][41][42], etc.…”

Section: Introductionmentioning

confidence: 99%

Quantifying arbitrary-spin-wave-driven domain wall motion, the creep nature of domain wall and the mechanism for domain wall advances

Gao

Weng

et al. 2019

New J. Phys.

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Domain wall motion (DWM) by spin waves (SWs) in different waveforms in a magnetic nanostripe is investigated via micromagnetic simulations. Diversified DWMs are observed. It is found that SW harmonic drives DWM most efficiently and irregular SW may cause abnormal excitation spectrum for DWM in the low-frequency range. We prove that SW harmonic is the basic element when interacting with DW and causes simple creeping motion of DW (i.e. forward propagation of DW accompanied with oscillation) with the same frequency as applied SW harmonic. Under irregular/polychromatic SW, DW makes responses to the energies carried by constituent SW harmonics, instead of overall exhibited torques, and simultaneously conducts multiple creeping motions. This finding enables the analysis for the induced DWM under arbitrary SW. Mapping of SW inside DW reveals that the simple creeping motion is due to real-space expansion and contraction inside DW and the monolithic translation of DW. It is further elucidated that the former relates to the transmitting of spin torques of SW through DW and the latter corresponds to the absorption of spin torques by DW. The overall absorbed spin torques point to direction same as SW propagation and drive DW forward. In addition, the absorption mechanism is evidenced by the well agreement between absorption of SW and averaged velocity of DW. various magnetic structures. In addition, the ability to assist other approaches for improved performance in DWM gives it an extra advantage [50,51].On the other hand, the interplay between SW and DW remains interesting in fundamental physics. Although great effort has been made in understanding the basic characteristics of SW-induced DWM in terms of both theoretical analysis [34,35,[37][38][39]41] and micromagnetic simulations [32-36, 40, 42], the precise picture in dynamics was never determined. So far, two major mechanisms were proposed: magnonic spin-transfer torque (STT) [34] and magnonic linear momentum transfer torque (LMTT) [11,35]. In STT (for a simplified 1D model), linearization on Landau-Lifshitz-Gilbert (LLG) equation gives a solution of reflectionless propagating SW described by a Schrodinger equation. The obtained SW carries a constant magnon current transmitting through DW. Magnons can be viewed as spin-1 bosons with angular momentum ±ÿ and linear momentum ÿk. As a magnon passes through the DW, its spin is changed by 2ÿ; according to the conservation of angular momentum, the spin of 2ÿ must be transferred to DW, which further results in the backward motion of DW with respect to SW propagation [34,41]. On the other hand, what concerns the LMTT theory is the conservation law for linear momentum. LMTT was proposed to explain cases with reflection. Reflected magnon reverses its wave vector k in sign. That is, the linear momentum is changed by 2ÿk. The transfer of linear momentum to DW rewrites the effective field in LLG and causes forward motion of DW [35,42]. STT and LMTT can only be partially correct due to the fact that SW transmission varies with frequenc...

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Section: Introductionmentioning

confidence: 99%

Quantifying arbitrary-spin-wave-driven domain wall motion, the creep nature of domain wall and the mechanism for domain wall advances

Gao

Weng

et al. 2019

New J. Phys.

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“…The possibility of domain-wall manipulating in magnetoelastic nanostrips using uniform mechanical stresses was recently demonstrated theoretically [8,9]. The interest in studying the motion of domains and domain walls is due largely to the development of spintronics devices with nanometer-sized elements.…”

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confidence: 99%

“…The interest in studying the motion of domains and domain walls is due largely to the development of spintronics devices with nanometer-sized elements. Domain walls are considered key elements of information processing devices, including nonvolatile solid-state memory devices [4,[9][10][11][12][13][14][15]. This memory could provide considerably higher recording density than modern hard drives, which along with high read/write speeds allows it to be considered a possible universal memory.…”

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confidence: 99%

“…The position or velocity of the domain wall in nanosized strips of a certain shape on piezoelectric substrates can be controlled if the symmetry of the magnetic states in one-dimensional ferromagnets is broken. This approach produces unusual configurations of domain walls and domain-wall velocities on the same order of magnitude [9] as when exposed to magnetic fields or spin-polarized currents, while the energy consumption required to move the domain wall is significantly reduced.…”

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confidence: 99%

“…In the studied nanostrips, the easy magnetization axis was directed along the long side of the strip. Using mathematical modeling, the domain wall in a nanostrip with a parabolic profile in the equilibrium state was shown to be located at the center of a strip in [9]. When mechanical stress is applied (as a result of applying an electric field to the piezoelectric substrate), the domain wall is shifted to a new equilibrium position, which can be used in logical and storage devices of nanospintronics.…”

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confidence: 99%

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Equilibrium Distribution of Magnetization and Processes of Magnetization Reversal in Magnetoelastic Nanostructures

Логунов

Никитов

Temiryazev

et al. 2020

Bull. Russ. Acad. Sci. Phys.

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Results are presented from an experimental study of the equilibrium distribution of magnetization and processes of magnetization reversal of magnetoelastic nanostructures in the form of strips with constant or variable width. It is shown that the symmetry of the stable magnetization states in the nanostrip can be broken by a static magnetic field applied perpendicular to the ferromagnet's easy axis. A further change in the states of magnetization allows their manipulation (e.g., moving the domain wall) using the homogeneous mechanical effects induced by applying an electric field to the piezoelectric substrate.

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Strain‐controlled dynamics of transverse domain walls in hybrid piezoelectric–magnetostrictive heterostructures: An asymptotic approach

Halder,

Maity,

Dwivedi

2024

Z Angew Math Mech

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The present work deals with an analytical study of the statical and dynamical behavior of transverse magnetic domain walls in hybrid bilayer piezoelectric/magnetostrictive heterostructures under the combined influence of spin‐polarized electric currents, transverse, and axial applied magnetic fields. The magnetostrictive material is considered to be isotropic and linearly elastic. We perform the investigation within the framework of the one‐dimensional Landau–Lifshitz–Gilbert equation. By employing the regular perturbation asymptotic expansion approach, we derive the explicit analytical expression of the most significant dynamic features, namely, traveling wave profile, DW velocity, and displacement under the influence of small and moderate transverse magnetic fields. Finally, we illustrate numerically the analytical results and delineate the domain wall motion for metallic and semiconductor ferromagnets.

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Domain-wall dynamics in magnetoelastic nanostripes

Cited by 13 publications

References 45 publications

Quantifying arbitrary-spin-wave-driven domain wall motion, the creep nature of domain wall and the mechanism for domain wall advances

Quantifying arbitrary-spin-wave-driven domain wall motion, the creep nature of domain wall and the mechanism for domain wall advances

Equilibrium Distribution of Magnetization and Processes of Magnetization Reversal in Magnetoelastic Nanostructures

Strain‐controlled dynamics of transverse domain walls in hybrid piezoelectric–magnetostrictive heterostructures: An asymptotic approach

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