English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/117648
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Improvement of domain wall conduit properties in cobalt nanowires by global gallium irradiation

AuthorsSerrano-Ramón, Luis; Fernández-Pacheco, Amalio; Córdoba, R.; Magen, Cesar; Rodríguez, Luis A.; Ibarra, M. Ricardo; Teresa, José María de
Issue Date2013
PublisherInstitute of Physics Publishing
CitationNanotechnology 24(34): 345703 (2013)
AbstractApplications based on the movement of domain walls (DWs) in magnetic nanowires (NWs) require a good DW conduit behavior, i.e. a significant difference between DW nucleation and propagation fields. In this work, we have systematically studied how this property evolves in cobalt NWs grown by focused electron beam induced deposition (FEBID) as a function of global gallium irradiation, for irradiation doses up to 1.24 × 1017 ions cm-2. Whereas for high doses the DW conduit is lost, below 6.42 × 1015 ions cm-2 the difference between the two fields increases with irradiation, becoming up to ∼9 times larger than for non-irradiated wires, due to a strong increase in the nucleation field, while the propagation field remains approximately constant. This behavior stems from two effects. The first effect is a decrease in the magnetic volume of the parasitic halo around the NW, typically present in FEBID nanostructures, leading to the disappearance of weak nucleation centers. The second effect is the formation of a 20 nm outer shell with Co crystals about twice the size of those forming the NW core, causing a net increase of the local magnetocrystalline anisotropy. The results presented here are important for the potential use of magnetic NWs grown by FEBID in DW-based devices, and might also be of interest for magnetic NWs fabricated by other techniques. © 2013 IOP Publishing Ltd.
Identifiersdoi: 10.1088/0957-4484/24/34/345703
issn: 0957-4484
e-issn: 1361-6528
Appears in Collections:(ICMA) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.