Modification of domain-wall propagation in Co nanowires via Ga+ irradiation

Serrano-Ramón, L., Fernandez-Pacheco, A. , Ibarra, M. R., Petit, D., Cowburn, R. P., Tyliszczak, T. and De Teresa, J. M. (2013) Modification of domain-wall propagation in Co nanowires via Ga+ irradiation. European Physical Journal B, 86, 97. (doi: 10.1140/epjb/e2013-30926-5)

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Abstract

The propagation of domain walls in polycrystalline Co nanowires grown by focused-electron-beam-induced deposition is explored. We have found that Ga+ irradiation via focused ion beam is a suitable method to modify the propagation field of domain walls in magnetic conduits. Magneto-optical Kerr effect measurements show that global Ga+ irradiation of the nanowires increases the domain-wall propagation field. Additionally, we have observed by means of scanning transmission X-ray microscopy that it is possible to produce substantial domain-wall pinning via local Ga+ irradiation of a narrow region of the nanowire. In both cases, Ga+ doses of the order of 1016 ions/cm2 are required to produce such effects. These results pave the way for the controlled manipulation of domain walls in Co nanowires via Ga+ irradiation.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Fernandez-Pacheco, Dr Amalio
Authors: Serrano-Ramón, L., Fernandez-Pacheco, A., Ibarra, M. R., Petit, D., Cowburn, R. P., Tyliszczak, T., and De Teresa, J. M.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:European Physical Journal B
Publisher:Springer
ISSN:1434-6028

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