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
Observation of the intrinsic pinning of a magnetic domain wall in a ferromagnetic nanowire
Tomohiro Koyama,Daichi Chiba,Daichi Chiba,Kohei Ueda,Kouta Kondou,Hironobu Tanigawa,Shunsuke Fukami,Teruaki Suzuki,Norikazu Ohshima,Nobuyuki Ishiwata,Yoshinobu Nakatani,Kensuke Kobayashi,Teruo Ono +12 more
TL;DR: Evidence is given that this intrinsic pinning determines the threshold, and thus that the adiabatic spin torque dominates the domain wall motion in a perpendicularly magnetized Co/Ni nanowire, to achieve robust operation and low energy consumption in spintronic devices.
Discretized topological Hall effect emerging from skyrmions in constricted geometry
Naoya Kanazawa,Masashi Kubota,Atsushi Tsukazaki,Yusuke Kozuka,Kei S. Takahashi,Masashi Kawasaki,Masashi Kawasaki,Masakazu Ichikawa,Fumitaka Kagawa,Yoshinori Tokura,Yoshinori Tokura +10 more
TL;DR: In this article, the topological Hall resistivity of a nanostructured FeGe Hall-bar was investigated by measuring the winding number of a spin texture as an emergent magnetic field.
Head-to-head domain walls in soft nano-strips: a refined phase diagram
TL;DR: In this article, the wall structure phase diagram in nano-strips is established by numerical calculations, exhibiting a hitherto unknown wall type, the asymmetric transverse wall, and the diagram of the wall width parameter is obtained both from a one-dimensional fit of wall structure and from the domain wall motion velocity under field, the latter being more relevant to experiments.
Thermal Stability of an Interface-Stabilized Skyrmion Lattice
TL;DR: The thermal stability of the magnetic nano-skyrmion lattice in the monolayer Fe/Ir(111) is investigated using temperature dependent spin-polarized scanning tunneling microscopy, indicating a loss of long-range magnetic order.