Design and characterization of a field-switchable nanomagnetic atom mirror

Hayward, T.J.; West, A.D.; Weatherill, K.J.; Curran, P.J.; Fry, P.W.; Fundi, P.M.; Gibbs, M.R.J.; Schrefl, T.; Adams, C.S.; Hughes, I.G.; Bending, S.J.; Allwood, D.A.

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.

Citation

Hayward, T., West, A., Weatherill, K., Curran, P., Fry, P., Fundi, P., …Allwood, D. (2010). Design and characterization of a field-switchable nanomagnetic atom mirror. Journal of Applied Physics, 108(4), https://doi.org/10.1063/1.3466995

• Journal Article Type: Article
• Publication Date: Aug 1, 2010
• Deposit Date: Sep 24, 2010
• Publicly Available Date: Oct 6, 2010
• Journal: Journal of Applied Physics
• Print ISSN: 0021-8979
• Electronic ISSN: 1089-7550
• Publisher: American Institute of Physics
• Peer Reviewed: Not Peer Reviewed
• Volume: 108
• Issue: 4
• DOI: https://doi.org/10.1063/1.3466995
• Public URL: https://durham-repository.worktribe.com/output/1517840
• Publisher URL: http://jap.aip.org/resource/1/japiau/v108/i4/p043906_s1