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Control of the switching behavior of ferromagnetic nanowires using magnetostatic interactions

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5 Author(s)
Basu, S. ; Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD, United Kingdom ; Fry, P.W. ; Gibbs, M.R.J. ; Schrefl, T.
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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.

Published in:

Journal of Applied Physics  (Volume:105 ,  Issue: 8 )

Date of Publication:

Apr 2009

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