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Título

Two-magnon bound state causes ultrafast thermally induced magnetisation switching

Autor Barker, J.; Atxitia, U. ; Ostler, T. A.; Hovorka, O.; Chubykalo-Fesenko, O. ; Chantrell, R. W.
Palabras clave Information storage
Magnetic properties and materials
Ferromagnetism
Atomistic models
Fecha de publicación 2013
EditorNature Publishing Group
Citación Scientific Reports 3: 3262 (2013)
ResumenThere has been much interest recently in the discovery of thermally induced magnetisation switching using femtosecond laser excitation, where a ferrimagnetic system can be switched deterministically without an applied magnetic field. Experimental results suggest that the reversal occurs due to intrinsic material properties, but so far the microscopic mechanism responsible for reversal has not been identified. Using computational and analytic methods we show that the switching is caused by the excitation of two-magnon bound states, the properties of which are dependent on material factors. This discovery allows us to accurately predict the onset of switching and the identification of this mechanism will allow new classes of materials to be identified or designed for memory devices in the THz regime.
Descripción This work is licensed under a Creative Commons Attribution 3.0 Unported license.
Versión del editorhttp://dx.doi.org/10.1038/srep03262
URI http://hdl.handle.net/10261/95713
DOI10.1038/srep03262
Identificadoresdoi: 10.1038/srep03262
issn: 2045-2322
Aparece en las colecciones: (ICMM) Artículos
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