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Control of the switching behavior of ferromagnetic nanowires using magnetostatic interactions

Basu, S., Fry, P.W., Gibs, M.R.J., Schrefl, T. and Allwood, D.A. (2009) Control of the switching behavior of ferromagnetic nanowires using magnetostatic interactions. Journal of Applied Physics, 105 (8). Art no.083901. ISSN 0021-8979


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Magnetostatic interactions between two end-to-end Permalloy (Ni80Fe20) nanowires have been studied as a function of their separation, end shape, and width. The change in switching field increases as the wires become closer, with deviations from the switching field of an isolated wire of up to 40% observed. The sign of the change depends on the relative magnetization orientation of the two wires, with higher fields for parallel magnetization and lower fields for antiparallel magnetization. A wire end shape has a strong influence, with larger field variations being seen for flat-ended wires than wires with tapered ends. The micromagnetic modeling and experiments performed here were in good qualitative agreement. The experimental control of switching behavior of one nanowire with another was also demonstrated using magnetostatic interactions.

Item Type: Article
Copyright, Publisher and Additional Information: © 2009 American Institute of Physics. This is an author produced version of a paper subsequently published in Journal of Applied Physics. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: ferromagnetic materials; magnetic domain walls; magnetic switching; magnetisation reversal; magnetostatics; micromagnetics; nanowires; Permalloy
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield)
The University of Sheffield > University of Sheffield Research Centres and Institutes > Centre for Nanoscience and Technology (Sheffield)
Depositing User: Miss Anthea Tucker
Date Deposited: 04 Aug 2009 08:39
Last Modified: 08 Feb 2013 16:58
Published Version: http://dx.doi.org/10.1063/1.3098251
Status: Published
Publisher: American Institute of Physics
Refereed: Yes
Identification Number: 10.1063/1.3098251
URI: http://eprints.whiterose.ac.uk/id/eprint/9040

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