Excitations with negative dispersion in a spin vortex

M. Buess; T. P.J. Knowles; R. Höllinger; T. Haug; U. Krey; D. Weiss; D. Pescia; M. R. Scheinfein; C. H. Back

doi:10.1103/PhysRevB.71.104415

Excitations with negative dispersion in a spin vortex

M. Buess, T. P.J. Knowles, R. Höllinger, T. Haug, U. Krey, D. Weiss, D. Pescia, M. R. Scheinfein, C. H. Back

Publikation: Beitrag in Fachzeitschrift › Artikel › Begutachtung

94 Zitate (Scopus)

Abstract

Micron-sized ferromagnetic permalloy disks having an in-plane vortexlike configuration are excited by a fast-rise-time magnetic-field pulse perpendicular to the plane. The excited modes are imaged using time-resolved magneto-optic Kerr microscopy and Fourier transformation. Two types of modes are observed: modes with circular nodes and modes with diametric nodes. The frequency of the modes with circular nodes increases with the number of nodes. In contrast, the frequency of the modes with diametric nodes decreases with the number of nodes. This behavior is explained accurately by an analytical model.

Originalsprache	Englisch
Aufsatznummer	104415
Fachzeitschrift	Physical Review B - Condensed Matter and Materials Physics
Jahrgang	71
Ausgabenummer	10
DOIs	https://doi.org/10.1103/PhysRevB.71.104415
Publikationsstatus	Veröffentlicht - 1 März 2005
Extern publiziert	Ja

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abstract = "Micron-sized ferromagnetic permalloy disks having an in-plane vortexlike configuration are excited by a fast-rise-time magnetic-field pulse perpendicular to the plane. The excited modes are imaged using time-resolved magneto-optic Kerr microscopy and Fourier transformation. Two types of modes are observed: modes with circular nodes and modes with diametric nodes. The frequency of the modes with circular nodes increases with the number of nodes. In contrast, the frequency of the modes with diametric nodes decreases with the number of nodes. This behavior is explained accurately by an analytical model.",

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AU - Knowles, T. P.J.

AU - Höllinger, R.

AU - Haug, T.

AU - Krey, U.

AU - Weiss, D.

AU - Pescia, D.

AU - Scheinfein, M. R.

AU - Back, C. H.

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N2 - Micron-sized ferromagnetic permalloy disks having an in-plane vortexlike configuration are excited by a fast-rise-time magnetic-field pulse perpendicular to the plane. The excited modes are imaged using time-resolved magneto-optic Kerr microscopy and Fourier transformation. Two types of modes are observed: modes with circular nodes and modes with diametric nodes. The frequency of the modes with circular nodes increases with the number of nodes. In contrast, the frequency of the modes with diametric nodes decreases with the number of nodes. This behavior is explained accurately by an analytical model.

AB - Micron-sized ferromagnetic permalloy disks having an in-plane vortexlike configuration are excited by a fast-rise-time magnetic-field pulse perpendicular to the plane. The excited modes are imaged using time-resolved magneto-optic Kerr microscopy and Fourier transformation. Two types of modes are observed: modes with circular nodes and modes with diametric nodes. The frequency of the modes with circular nodes increases with the number of nodes. In contrast, the frequency of the modes with diametric nodes decreases with the number of nodes. This behavior is explained accurately by an analytical model.

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Excitations with negative dispersion in a spin vortex

Abstract

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