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28 March 2024
 
  » arxiv » arxiv.0705.2445

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Artificial helical nanomagnets
A.A.Fraerman ; B.A.Gribkov ; S.A.Gusev ; B. Hjorvarsson ; A.Yu.Klimov ; V.L.Mironov ; D.S.Nikitushkin ; V.V.Rogov ; S.N.Vdovichev ; H.Zabel ;
Date 17 May 2007
Subject Strongly Correlated Electrons (cond-mat.str-el)
AbstractWe demonstrate the existence of a helical state in patterned multilayer nanomagnets. The artificial helimagnets consist of a stack of single domain ferromagnetic disks separated by insulating nonmagnetic spacers. The spiral state is shown to originate from the magnetostatic interaction between nearest and next nearest neighbouring single-domain disks in the stack. Since the magnetostatic interaction for such disks is rather strong, the helical state should be stable at room temperature. The helimagnets were fabricated from a [Co/Si]*3 multilayer using electron beam lithography. The helical state was confirmed by a magnetic stray field analysis using magnetic force microscopy.
Source arXiv, arxiv.0705.2445
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