Broadband spin dynamics of the magnetic vortex state: Effect of the pulsed field direction

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DOIResolve DOI: http://doi.org/10.1103/PhysRevB.71.180408
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TypeArticle
Journal titlePhys. Rev. B
Physical Review B (Condensed Matter and Materials Physics)
Volume71
Issue18
Pages1804084; # of pages: 180405
Subjectferromagnetic materials; magnetisation; Permalloy; spin dynamics
AbstractThe dynamic spin modes observed in magnetic vortex structures are shown to depend strongly on the nature of the initial excitation by a transient pulse field. In submicrometer-sized Permalloy disks, when a uniform perpendicular transient field is used to perturb the magnetization, radial standing-wave modes are excited; whereas if an in-plane transient field is used, angular or azimuthal modes are formed. The existence of the vortex core is responsible for a frequency splitting of the azimuthal modes, as demonstrated through comparison to micromagnetic simulations of a ring geometry.
Publication date
AffiliationNational Research Council Canada; National Institute for Nanotechnology
Peer reviewedNo
NPARC number12327732
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Record identifier5b02e0fa-2088-4661-a29d-7285e293fab0
Record created2009-09-10
Record modified2016-05-09
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