Abstract:
:There 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.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Barker J,Atxitia U,Ostler TA,Hovorka O,Chubykalo-Fesenko O,Chantrell RWdoi
10.1038/srep03262subject
Has Abstractpub_date
2013-11-20 00:00:00pages
3262issn
2045-2322pii
srep03262journal_volume
3pub_type
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