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Vortex rotation control in Permalloy disks with small circular voids (Articolo in rivista)

Type

Label

Vortex rotation control in Permalloy disks with small circular voids (Articolo in rivista) (literal)

Anno

Alternative label

Vavassori, P; Bovolenta, R; Metlushko, V; Ilic, B (2006)
Vortex rotation control in Permalloy disks with small circular voids
in Journal of applied physics
(literal)

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Rivista

Note

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CNR, INFM, Natl Res Ctr S3, I-41100 Modena, Italy; Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy; Univ Illinois, Dept Elect & Comp Engn, Chicago, IL 60607 USA; Cornell Univ, Cornell Nanofabricat Facil, Sch Appl & Engn Phys, Ithaca, NY 14853 USA (literal)

Titolo

Abstract

We studied the magnetization reversal of Permalloy disks with a small circular void either concentric or decentered. In both systems the reversal takes place via the nucleation and annihilation of a magnetic vortex. By applying the diffracted magneto-optic technique combined with numeric micromagnetic simulations we retrieved the information about the sense of rotation of the magnetization in the vortex state. For the disks with the concentric void no preferential rotation has been observed. For the case of decentered void, the sense of rotation of all probed disks is deterministically controlled by appropriately choosing the direction of the externally applied field and the void position with respect to the disk center. (literal)

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