Chirality and stability of vortex state in permalloy triangular ring micromagnets (Articolo in rivista)

Type
Label
  • Chirality and stability of vortex state in permalloy triangular ring micromagnets (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Vavassori, P; Donzelli, O; Grimsditch, M; Metlushko, V; Ilic, B (2007)
    Chirality and stability of vortex state in permalloy triangular ring micromagnets
    in Journal of applied physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Vavassori, P; Donzelli, O; Grimsditch, M; Metlushko, V; Ilic, B (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 101 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Ferrara, CNT INFM Natl Res Ctr S3, I-44100 Ferrara, Italy; Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy; Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA; Univ Illinois, Dept Elect & Comp Engn, Chicago, IL 60607 USA; Cornell Univ, Cornell Nanofabr Facil, Sch Appl & Engn Phys, Ithaca, NY 14853 USA (literal)
Titolo
  • Chirality and stability of vortex state in permalloy triangular ring micromagnets (literal)
Abstract
  • We present the results of a study of the magnetization reversal in Permalloy triangular rings using diffracted magneto-optics Kerr effect combined with numerical micromagnetic simulations and in-field magnetic force microscopy. Diffracted loops show a two-step switching process for external fields along or perpendicular to any of the ring edges. The diffracted loops calculated from micromagnetic simulations reproduce the measured ones and show that the switching occurs from one asymmetric onion state to the reversed state, for both directions of the applied field. In both cases a stable intermediate vortex state appears during the switching, accounting for the diffracted loop structures. The stability and the magnetization chirality of the vortex state depend on the direction of the applied field relative to the ring orientation. Magnetization configurations occurring during reversal imaged with magnetic force microscopy operated applying an external field confirm the above reversal process. (c) 2007 American Institute of Physics. (literal)
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