Dynamics of current-driven magnetic domain walls and skyrmions
I. Purnama
- 01 Jan 2015
TL;DR: In this paper, the authors propose a method to solve the problem of homonymity in homonym identification, i.e., "homonymity-based homonymization".
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Citations
•Journal Article
Universal current-velocity relation of skyrmion motion in chiral magnets
TL;DR: A numerical simulation of Landau-Lifshitz-Gilbert equation reveals a remarkably robust and universal current-velocity relation of the skyrmion motion driven by the spin-transfer-torque unaffected by either impurities or nonadiabatic effect in sharp contrast to the case of domain wall or spin helix.
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•Journal Article
Fractional vortices and composite domain walls in flat nanomagnets
Oleg Tchernyshyov,Gia-Wei Chern +1 more
TL;DR: An explanation of complex magnetic patterns observed in ferromagnetic nanostructures is provided and elementary topological defects in the field of magnetization are identified: ordinary vortices in the bulk and vorts with half-integer winding numbers confined to the edge.
•Journal Article
Extended skyrmion phase in epitaxial FeGe(111) thin films
TL;DR: In this article, the authors extended the topological Hall effect on the Skyrmion state in epitaxial B20 FeGe(111) thin films to cover all temperatures up to the Curie temperature T(C)≈271 K and over a wide magnetic field range.
•Journal Article
Emergent Electrodynamics of Skyrmions in Chiral Magnets
TL;DR: In this article, Hall effect measurements were used to establish quantitatively the predicted emergent electrodynamics of skyrmions in chiral magnets and their depinning from impurities and their subsequent motion.
References
•Posted Content
Deterministic Domain Wall Motion Orthogonal To Current Flow Due To Spin Orbit Torque
Debanjan Bhowmik,Mark E. Nowakowski,Long You,OukJae Lee,David Keating,Mark Wong,Jeffrey Bokor,Sayeef Salahuddin,Sayeef Salahuddin +8 more
TL;DR: Deterministic control of a ferromagnetic domain wall orthogonal to current flow is demonstrated by exploiting the spin orbit torque in a perpendicularly polarized Ta/CoFeB/MgO heterostructure in presence of an in-plane magnetic field.
Experimental study of domain wall motion in long nanostrips under the influence of a transverse field
TL;DR: In this article, a real-time study of field driven domain wall motion in giant magnetoresistance nanostrips under the influence of both longitudinal and transverse fields is presented.
Current-induced resonance and mass determination of a single magnetic domain wall
TL;DR: The direct observation of the dynamics of a single DW in a ferromagnetic nanowire is reported, which demonstrates that such a topological particle has a very small but finite mass of 6.6 × 10-23 kg.
Flower-like dynamics of coupled Skyrmions with dual resonant modes by a single-frequency microwave magnetic field.
TL;DR: It is found that flower-like dynamics of coupled skyrmions is always accompanied by an excitation of an eigenfrequency near 1.15 GHz, which is strongly associated with the large non-local deformation of the topological density distribution of coupled Skyrmion.
Direct observation and dynamics of spontaneous skyrmion-like magnetic domains in a ferromagnet
Masahiro Nagao,Masahiro Nagao,Yeong-Gi So,Yeong-Gi So,Hiroyuki Yoshida,Masaaki Isobe,Toru Hara,Kazuo Ishizuka,Koji Kimoto +8 more
TL;DR: The first observation of skyrmion-like magnetic nanodomains in a ferromagnetic manganite, La 0.5Ba0.5MnO3, is reported using Lorentz transmission electron microscopy (LTEM), and it is found that the repeated reversal of magnetic chirality is caused by thermal fluctuation.