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Skyrmion glass in a 2D Heisenberg ferromagnet with quenched disorder

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Titel Skyrmion glass in a 2D Heisenberg ferromagnet with quenched disorder
Serientitel New Journal of Physics, Volume 20, 2018
Autor Chudnovsky, E. M.
Garanin, D. A.
Lizenz CC-Namensnennung 3.0 Unported:
Sie dürfen das Werk bzw. den Inhalt zu jedem legalen Zweck nutzen, verändern und in unveränderter oder veränderter Form vervielfältigen, verbreiten und öffentlich zugänglich machen, sofern Sie den Namen des Autors/Rechteinhabers in der von ihm festgelegten Weise nennen.
DOI 10.5446/38877
Herausgeber Institute of Physics (IOP), Deutsche Physikalische Gesellschaft (DPG)
Erscheinungsjahr 2018
Sprache Englisch

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Fachgebiet Physik
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 .

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