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Resonant translational, breathing and twisting modes of pinned transverse magnetic domain walls

Resonant translational, breathing and twisting modes of pinned transverse magnetic domain walls
Resonant translational, breathing and twisting modes of pinned transverse magnetic domain walls
We study translational, breathing and twisting resonant modes of transverse magnetic domain walls pinned at notches in ferromagnetic nanostrips. We demonstrate that a mode's sensitivity to notches depends strongly on the characteristics of that particular resonance. For example, the frequencies of modes involving lateral motion of the wall are the ones which are most sensitive to changes in the notch intrusion depth (especially at the narrower, more strongly confined end of the domain wall). In contrast, the breathing mode, whose dynamics are concentrated away from the notches is relatively insensitive to changes in the notches' sizes. We also demonstrate a sharp drop in the translational mode's frequency towards zero when approaching depinning which is found, using a harmonic oscillator model, to be consistent with a reduction in the local slope of the notch-induced confining potential at its edge.
1550-235X
1-10
Metaxas, Peter J.
422e8ca8-6e4a-48cb-b7eb-1e11a73361e3
Albert, Maximilian
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Lequeux, Steven
bd16acfa-7062-48a2-91c5-ba76658e8573
Cros, Vincent
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Grollier, Julie
638cd7c5-12e7-46a5-9998-b6cd532dda31
Bortolotti, Paolo
1b3f2a8f-ba8f-4f9e-b2d9-d1d93578ab77
Anane, Abdelmadjid
dc367e1a-fb2f-4c77-8c7e-dc29c9005b97
Fangohr, Hans
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Metaxas, Peter J.
422e8ca8-6e4a-48cb-b7eb-1e11a73361e3
Albert, Maximilian
a8049610-1e98-4cfb-b59a-177645a42b47
Lequeux, Steven
bd16acfa-7062-48a2-91c5-ba76658e8573
Cros, Vincent
4ac9f84a-43c4-4607-b047-fb916ea7957e
Grollier, Julie
638cd7c5-12e7-46a5-9998-b6cd532dda31
Bortolotti, Paolo
1b3f2a8f-ba8f-4f9e-b2d9-d1d93578ab77
Anane, Abdelmadjid
dc367e1a-fb2f-4c77-8c7e-dc29c9005b97
Fangohr, Hans
9b7cfab9-d5dc-45dc-947c-2eba5c81a160

Metaxas, Peter J., Albert, Maximilian, Lequeux, Steven, Cros, Vincent, Grollier, Julie, Bortolotti, Paolo, Anane, Abdelmadjid and Fangohr, Hans (2016) Resonant translational, breathing and twisting modes of pinned transverse magnetic domain walls. Physical Review B, 93 (5), 1-10. (doi:10.1103/PhysRevB.93.054414).

Record type: Article

Abstract

We study translational, breathing and twisting resonant modes of transverse magnetic domain walls pinned at notches in ferromagnetic nanostrips. We demonstrate that a mode's sensitivity to notches depends strongly on the characteristics of that particular resonance. For example, the frequencies of modes involving lateral motion of the wall are the ones which are most sensitive to changes in the notch intrusion depth (especially at the narrower, more strongly confined end of the domain wall). In contrast, the breathing mode, whose dynamics are concentrated away from the notches is relatively insensitive to changes in the notches' sizes. We also demonstrate a sharp drop in the translational mode's frequency towards zero when approaching depinning which is found, using a harmonic oscillator model, to be consistent with a reduction in the local slope of the notch-induced confining potential at its edge.

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1411.4502 v2 - Accepted Manuscript
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Submitted date: 17 November 2014
Published date: 12 February 2016
Organisations: Aeronautics, Astronautics & Comp. Eng

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Local EPrints ID: 381802
URI: https://eprints.soton.ac.uk/id/eprint/381802
ISSN: 1550-235X
PURE UUID: 1f7ba78a-569d-4417-b181-c83267c7a0d3

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Date deposited: 16 Oct 2015 07:49
Last modified: 29 Nov 2018 17:31

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