Skyrmion glass in a 2D Heisenberg ferromagnet with quenched disorder
TLDR
In this article, an analytical theory for the dependence of the average size of a skyrmion on the magnetic field H, and for stability of such skyrms on a lattice, has been developed.Abstract:
A 2D Heisenberg ferromagnet with exchange J and random magnetic anisotropy of strength has been studied. Analytical theory for the dependence of the average size of a pinned skyrmion on the magnetic field H, and for stability of such skyrmions on a lattice, has been developed. It has been complemented by numerical studies of 2D lattices containing up to 40 million spins. At low fields the average size of the skyrmion, λ, is determined by the average size of Imry–Ma domains. On increasing the field the skyrmions first shrink, with , and then collapse at fields distributed around . The concentration of the skyrmions goes down with the field as .read more
Citations
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Quantum collapse of a magnetic skyrmion
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Realization of ordered magnetic skyrmions in thin films at ambient conditions
Ryan D. Desautels,Lisa DeBeer-Schmitt,S. A. Montoya,Julie A. Borchers,Soong-Geun Je,Nan Tang,Mi-Young Im,Michael R. Fitzsimmons,Eric E. Fullerton,Dustin A. Gilbert +9 more
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Writing skyrmions with a magnetic dipole
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References
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Journal ArticleDOI
Vortices in high-temperature superconductors
TL;DR: The Ginzburg number as discussed by the authors was introduced to account for thermal and quantum fluctuations and quenched disorder in high-temperature superconductors, leading to interesting effects such as melting of the vortex lattice, the creation of new vortex-liquid phases, and the appearance of macroscopic quantum phenomena.
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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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Random-Field Instability of the Ordered State of Continuous Symmetry
Yoseph Imry,Shang-keng Ma +1 more
TL;DR: In this article, it was shown that when the order parameter has a continuous symmetry, the ordered state is unstable against an arbitrarily weak random field in less than four dimensions and the borderline dimensionality above which mean-field-theory results hold is six.
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Spontaneous skyrmion ground states in magnetic metals
TL;DR: It is theoretically shown that skyrmion textures may form spontaneously in condensed-matter systems with chiral interactions without the assistance of external fields or the proliferation of defects, within a phenomenological continuum model based on a few material-specific parameters that can be determined experimentally.
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Spontaneous atomic-scale magnetic skyrmion lattice in two dimensions
Stefan Heinze,Kirsten von Bergmann,Matthias Menzel,Jens Brede,André Kubetzka,Roland Wiesendanger,Gustav Bihlmayer,Stefan Blügel +7 more
TL;DR: In this article, a two-dimensional square lattice of skyrmions on the atomic length scale was described as the magnetic ground state of a hexagonal Fe film of one-atomic-layer thickness on the Ir(111) surface.