Nanomagnetic engineering of the properties of domain wall atom traps

Hayward, T.J.; West, A.D.; Weatherill, K.J.; Schrefl, T.; Hughes, I.G.; Allwood, D.A.

Abstract

We have used the results of micromagnetic simulations to investigate the effects of nanowire geometry and domain wall magnetization structure on the characteristic parameters of magnetic atom traps formed by domain walls in planar ferromagnetic nanowires. It is found that when traps are formed in the near-field of a domain wall both nanowire geometry and wall structure have a substantial effect on trap frequency (how tightly atoms are spatially confined) and adiabaticity (how closely the atoms’ magnetic moments track the applied field direction within the trap). We also show that in certain regimes a trap’s depth depends only on the amplitude of an externally applied rotating magnetic field, thus allowing it to be tuned independently of the trap’s other critical parameters.

Citation

Hayward, T., West, A., Weatherill, K., Schrefl, T., Hughes, I., & Allwood, D. (2011). Nanomagnetic engineering of the properties of domain wall atom traps. Journal of Applied Physics, 110(12), Article 123918. https://doi.org/10.1063/1.3671631

• Journal Article Type: Article
• Publication Date: Dec 1, 2011
• Deposit Date: Jan 26, 2012
• Publicly Available Date: Sep 26, 2012
• Journal: Journal of Applied Physics
• Print ISSN: 0021-8979
• Electronic ISSN: 1089-7550
• Publisher: American Institute of Physics
• Peer Reviewed: Peer Reviewed
• Volume: 110
• Issue: 12
• Article Number: 123918
• DOI: https://doi.org/10.1063/1.3671631
• Public URL: https://durham-repository.worktribe.com/output/1528727