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The dynamics of current-induced motion of a magnetic domain wall in a quasi-one-dimensional ferromagnet with both easy-axis and easy-plane anisotropy, is studied. We pay a special attention to the case of a sharp domain wall, and calculate…

材料科学 · 物理学 2009-11-11 V. K. Dugaev , V. R. Vieira , P. D. Sacramento , J. Barnas , M. A. N. Araujo , J. Berakdar

We demonstrate deterministic control of dipole-field-stabilized skyrmions by means of spin-orbit torques arising from heavy transition-metal seed layers. Experiments are performed on amorphous Fe/Gd multilayers that are patterned into wires…

One of the fundamental effects of the laser-matter interaction is the appearance of an induced transient magnetisation. While the underlying phenomena differ in their microscopic origin and cover a diverse array of materials, here we…

介观与纳米尺度物理 · 物理学 2023-09-26 Paul-Iulian Gavriloaea , Elías Saugar , Rubén Otxoa , Oksana Chubykalo-Fesenko

We report on a theoretical study of the spin-current excited dynamics of domain walls (DWs) in ferrimagnets in the vicinity of the angular momentum compensation point. Effective Lagrangian and nonlinear dynamic equations are derived for a…

应用物理 · 物理学 2021-05-12 V. V. Yurlov , K. A. Zvezdin , P. N. Skirdkov , A. K. Zvezdin

Domain wall motion along ferrimagnets is evaluated using micromagnetic simulations and a collective-coordinates model, both considering two sublattices with independent parameters. Analytical expressions are derived for strips on top of…

应用物理 · 物理学 2020-11-20 Eduardo Martínez , Víctor Raposo , Óscar Alejos

Spinful superfluids of ultracold atoms are ideal for investigating the intrinsic properties of spin current and texture because they are realized in an isolated, nondissipative system free from impurities, dislocations, and thermal…

量子气体 · 物理学 2022-02-09 Hiromitsu Takeuchi

We have studied current-driven domain wall motion in modified Ga_0.95Mn_0.05As Hall bar structures with perpendicular anisotropy by using spatially resolved Polar Magneto-Optical Kerr Effect Microscopy and micromagnetic simulation.…

介观与纳米尺度物理 · 物理学 2009-11-13 K. Y. Wang , A. C. Irvine , R. P. Campion , C. T. Foxon , J. Wunderlich , D. A. Williams , B. L. Gallagher

The motion of a N\'eel-like ${180}^{\circ}$ domain wall induced by a time-dependent staggered spin-orbit field in the layered collinear antiferromagnet Mn$_2$Au is explored. Through an effective version of the two sublattice nonlinear…

材料科学 · 物理学 2022-07-20 R. Rama-Eiroa , P. E. Roy , J. M. González , K. Y. Guslienko , J. Wunderlich , R. M. Otxoa

We predict a thermodynamic magnon recoil effect for domain wall motions in the presence of temperature gradients. All current thermodynamic theories assert that a magnetic domain wall must move toward the hotter side, based on equilibrium…

介观与纳米尺度物理 · 物理学 2015-10-01 Peng Yan , Yunshan Cao , Jairo Sinova

Discovering alternative ways to drive domain wall (DW) dynamics is crucial for advancing spintronic applications. Here we demonstrate via atomistic spin dynamics simulations that optical torques can efficiently drive 90^{\circ} DWs in the…

Recent studies have predicted extraordinary properties for transverse domain walls in cylindrical nanowires: zero depinning current, the absence of the Walker breakdown, and applications as domain wall oscillators. In order to reliably…

Domain walls in ferroelectrics exhibit a plethora of phases and functionalities not found in the bulk. The interplay of electrostatic, chemical, topological, and distortive inhomogeneities at the walls can be so complex, however, that this…

介观与纳米尺度物理 · 物理学 2017-02-23 Gabriele De Luca , Marta D. Rossell , Jakob Schaab , Nathalie Viart , Manfred Fiebig , Morgan Trassin

The recent experimental demonstration of spin-polarized supercurrents offer a venue for establishment of a superconducting analogue to conventional spintronics. Whereas domain wall motion in purely magnetic structures is a well-studied…

超导电性 · 物理学 2015-06-18 Jacob Linder , Klaus Halterman

According to the recent experiment by the Fert group, the velocity of domain wall motion in the spin valve ferromagnetic nanowires was almost doubly enhanced compared to the old value. In this work, we propose an additional torque model,…

材料科学 · 物理学 2008-11-21 Tae-Suk Kim

We express dynamics of domain walls in ferromagnetic nanowires in terms of collective coordinates generalizing Thiele's steady-state results. For weak external perturbations the dynamics is dominated by a few soft modes. The general…

材料科学 · 物理学 2008-03-31 O. A. Tretiakov , D. Clarke , Gia-Wei Chern , Ya. B. Bazaliy , O. Tchernyshyov

We study two reciprocal thermal effects in the ferromagnetic semiconductor (Ga,Mn)As by scattering theory: domain wall motion induced by a temperature gradient as well as heat currents pumped by a moving domain wall. The effective…

介观与纳米尺度物理 · 物理学 2010-03-03 Kjetil M. D. Hals , Arne Brataas , Gerrit E. W. Bauer

The purpose of the research is the construction of the analytical model for description of spin-polarized current-driven ferromagnetic domain wall motion with a skyrmion building block. The dependence of velocity of ferromagnetic domain…

介观与纳米尺度物理 · 物理学 2020-03-30 O. Gorobets , Yu. Gorobets , I. Tiukavkina , R. Gerasimenko

We theoretically study the current-induced dynamics of a domain wall in a ferromagnetic nanotube by developing a theory for the orbital angular momentum of a domain wall and the current-induced torque on it. Specifically, a domain wall with…

介观与纳米尺度物理 · 物理学 2021-10-13 Seungho Lee , Se Kwon Kim

We propose here a high-frequency spin-Hall nano-oscillator based on a simple magnetic texture, such as a domain wall, located in an antiferromagnet with easy-axis anisotropy type. We show that the spin current, polarized along the…

介观与纳米尺度物理 · 物理学 2023-04-28 Roman V. Ovcharov , Elena G. Galkina , Boris A. Ivanov , Roman S. Khymyn

The dynamics of magnetic domain walls along ferromagnetic strips with spatially modulated perpendicular magnetic anisotropy is theoretically studied by means of micromagnetic simulations. Ferromagnetic layers with a periodic sawtooth…

材料科学 · 物理学 2018-06-19 Luis Sánchez-Tejerina , Óscar Alejos , Víctor Raposo , Eduardo Martínez