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Title

Influence of the shape and surface oxidation in the magnetization reversal of thin iron nanowires grown by focused electron beam induced deposition

AuthorsRodríguez, Luis A.; Deen, Lorenz; Córdoba, R.; Magen, Cesar; Snoeck, E.; Koopmans, Bert; Teresa, José María de
KeywordsMagneto-optical Kerr effect
Transmission electron microscopy
Magnetization reversal
Coercive field
Focused electron beam induced deposition
Iron nanowires
Issue Date2015
PublisherBeilstein-Institut zur Förderung der Chemischen Wissenschaften
CitationBeilstein Journal of Nanotechnology 6: 1319-1331 (2015)
AbstractIron nanostructures grown by focused electron beam induced deposition (FEBID) are promising for applications in magnetic sensing, storage and logic. Such applications require a precise design and determination of the coercive field (H C), which depends on the shape of the nanostructure. In the present work, we have used the Fe2(CO)9 precursor to grow iron nanowires by FEBID in the thickness range from 10 to 45 nm and width range from 50 to 500 nm. These nanowires exhibit an Fe content between 80 and 85%, thus giving a high ferromagnetic signal. Magneto-optical Kerr characterization indicates that H C decreases for increasing thickness and width, providing a route to control the magnetization reversal field through the modification of the nanowire dimensions. Transmission electron microscopy experiments indicate that these wires have a bell-type shape with a surface oxide layer of about 5 nm. Such features are decisive in the actual value of H C as micromagnetic simulations demonstrate. These results will help to make appropriate designs of magnetic nanowires grown by FEBID.
Publisher version (URL)https://doi.org/10.3762/bjnano.6.136
URIhttp://hdl.handle.net/10261/147790
DOI10.3762/bjnano.6.136
Identifiersdoi: 10.3762/bjnano.6.136
issn: 2190-4286
Appears in Collections:(ICMA) Artículos
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