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Design and characterization of a field-switchable nanomagnetic atom mirror.

Hayward, T.J. and West, A.D. and Weatherill, K.J. and Curran, P.J. and Fry, P.W. and Fundi, P.M. and Gibbs, M.R.J. and Schrefl, T. and Adams, C.S. and Hughes, I.G. and Bending, S.J. and Allwood, D.A. (2010) 'Design and characterization of a field-switchable nanomagnetic atom mirror.', Journal of applied physics., 108 (4). 043906.

Abstract

We present a design for a switchable nanomagnetic atom mirror formed by an array of 180° domain walls confined within Ni80Fe20 planar nanowires. A simple analytical model is developed which allows the magnetic field produced by the domain wall array to be calculated. This model is then used to optimize the geometry of the nanowires so as to maximize the reflectivity of the atom mirror. We then describe the fabrication of a nanowire array and characterize its magnetic behavior using magneto-optic Kerr effect magnetometry, scanning Hall probe microscopy, and micromagnetic simulations, demonstrating how the mobility of the domain walls allow the atom mirror to be switched “on” and “off” in a manner which would be impossible for conventional designs. Finally, we model the reflection of 87Rb atoms from the atom mirror’s surface, showing that our design is well suited for investigating interactions between domain walls and cold atoms.

Item Type:Article
Full text:PDF - Submitted Version (2226Kb)
Status:Not peer-reviewed
Publisher Web site:http://dx.doi.org/10.1063/1.3466995
Publisher statement:Copyright (2010) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Hayward, T.J. and West, A.D. and Weatherill, K.J. and Curran, P.J. and Fry, P.W. and Fundi, P.M. and Gibbs, M.R.J. and Schrefl, T. and Adams, C.S. and Hughes, I.G. and Bending, S.J. and Allwood, D.A. (2010) 'Design and characterization of a field-switchable nanomagnetic atom mirror.', Journal of applied physics., 108 (4). 043906 and may be found at http://dx.doi.org/10.1063/1.3466995
Record Created:01 Oct 2010 14:35
Last Modified:06 Oct 2010 14:44

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