Current-induced skyrmion dynamics in constricted geometries
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TLDR
This work shows by micromagnetic simulations that the current-induced motion of skyrmions in the presence of geometrical boundaries is very different from that in an infinite plane, and shows that a single skyrMion can be created by an electric current in a simple constricted geometry comprising a plate-shaped specimen of suitable size and geometry.Abstract:
Magnetic skyrmions--vortex-like swirling spin structures with a quantized topological number that are observed in chiral magnets--are appealing for potential applications in spintronics because it is possible to control their motion with ultralow current density. To realize skyrmion-based spintronic devices, it is essential to understand skyrmion motions in confined geometries. Here we show by micromagnetic simulations that the current-induced motion of skyrmions in the presence of geometrical boundaries is very different from that in an infinite plane. In a channel of finite width, transverse confinement results in steady-state characteristics of the skyrmion velocity as a function of current that are similar to those of domain walls in ferromagnets, whereas the transient behaviour depends on the initial distance of the skyrmion from the boundary. Furthermore, we show that a single skyrmion can be created by an electric current in a simple constricted geometry comprising a plate-shaped specimen of suitable size and geometry. These findings could guide the design of skyrmion-based devices in which skyrmions are used as information carriers.read more
Citations
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Journal ArticleDOI
Topological properties and dynamics of magnetic skyrmions
TL;DR: From this description, potential applications of skyrmions as information carriers in magnetic information storage and processing devices are envisaged.
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Magnetic skyrmions: advances in physics and potential applications
TL;DR: A review of the underlying physics of the stabilization of skyrmions at room temperature and their prospective use for spintronic applications is discussed in this paper, where the development of topological spintronics holds promise for applications in the mid-term furure, even though many challenges such as the achievement of writing, processing and reading functionalities at room-temperature and in all-electrical manipulation schemes, still lie ahead.
Journal ArticleDOI
Observation of room-temperature magnetic skyrmions and their current-driven dynamics in ultrathin metallic ferromagnets
Seonghoon Woo,Kai Litzius,Benjamin Krüger,Mi-Young Im,Mi-Young Im,Lucas Caretta,K. Richter,Maxwell Mann,Andrea Krone,Robert M. Reeve,Markus Weigand,Parnika Agrawal,Ivan Lemesh,Mohamad-Assaad Mawass,Mohamad-Assaad Mawass,Peter Fischer,Peter Fischer,Mathias Kläui,Geoffrey S. D. Beach +18 more
TL;DR: In this paper, stable magnetic skyrmions at room temperature in ultrathin transition metal ferromagnets with magnetic transmission soft X-ray microscopy were observed and demonstrated.
Journal ArticleDOI
Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
TL;DR: In this article, the authors focus on the recent advances on the route to devices prototypes, focusing on thin film and multilayered structures in which skyrmions are stabilized above room temperature and manipulated by current.
Journal ArticleDOI
Blowing magnetic skyrmion bubbles
Wanjun Jiang,Pramey Upadhyaya,Wei Zhang,Guoqiang Yu,M. Benjamin Jungfleisch,Frank Y. Fradin,John E. Pearson,Yaroslav Tserkovnyak,Kang L. Wang,Olle Heinonen,Suzanne G. E. te Velthuis,Axel Hoffmann +11 more
TL;DR: A phase diagram for skyrmion formation is determined and the efficient manipulation of these dynamically created skyrMions, including depinning and motion, are revealed, which could lead to progress in sk Kyrmion-based spintronics.
References
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Skyrmion Lattice in a Chiral Magnet
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TL;DR: The Finite Element Method: Its Basis and Fundamentals offers a complete introduction to the basis of the finite element method, covering fundamental theory and worked examples in the detail required for readers to apply the knowledge to their own engineering problems and understand more advanced applications.
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