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

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

doi:10.1103/PhysRevLett.98.147202

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

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

Department of Physics

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Abstract

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. © 2007 The American Physical Society.

Original language	English
Article number	147202
Journal	Physical Review Letters
Volume	98
DOIs	https://doi.org/10.1103/PhysRevLett.98.147202
Publication status	Published - 3 Apr 2007

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10.1103/PhysRevLett.98.147202

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title = "Magnetic instability regions in patterned structures: Influence of element shape on magnetization reversal dynamics",

abstract = "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. {\textcopyright} 2007 The American Physical Society.",

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AU - Han, X. F.

AU - Grimsditch, M.

AU - Meersschaut, J.

AU - Hoffmann, A.

AU - Ji, Y.

AU - Sort, J.

AU - Nogués, J.

AU - Divan, R.

AU - Pearson, J. E.

AU - Keavney, D. J.

PY - 2007/4/3

Y1 - 2007/4/3

N2 - 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. © 2007 The American Physical Society.

AB - 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. © 2007 The American Physical Society.

U2 - 10.1103/PhysRevLett.98.147202

DO - 10.1103/PhysRevLett.98.147202

M3 - Article

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VL - 98

JO - Physical Review Letters

JF - Physical Review Letters

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ER -

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

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