Magnetic instability regions in patterned structures: influence of element shape on magnetization reversal dynamics.

Han, X F; Grimsditch, M; Meersschaut, J; Hoffmann, A; Ji, Y; Sort, J; Nogués, J; Divan, R; Pearson, J E; Keavney, D J

Han, X F; Grimsditch, M; Meersschaut, J; Hoffmann, A; Ji, Y; Sort, J; Nogués, J; Divan, R; Pearson, J E; Keavney, D J.

Afiliación

Han XF; Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.

Phys Rev Lett ; 98(14): 147202, 2007 Apr 06.

Article en En | MEDLINE | ID: mdl-17501307

RESUMEN

We report a time-resolved imaging study of the influence of shape on magnetic instabilities in patterned magnetic structures. We find that in rectangular structures magnetization reversal initiates at the ends and interior simultaneously, while in structures with tapered ends the reversal begins in the middle of the structures and spreads out to the ends. The degree of tapering is important for both the switching field and the time required for full reversal. A model based on the concept of local instability regions yields good agreement with the observed location of the reversal onsets.

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2007 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos

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