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Title

Spin configuration in isolated FeCoCu nanowires modulated in diameter

AuthorsIglesias-Freire, Óscar ; Bran, Cristina ; Berganza, Eider ; Mínguez-Bacho, I. ; Magén, César; Vázquez Villalabeitia, Manuel ; Asenjo Barahona, Agustina
KeywordsSpintronics
Magnetic materials
Magnetic force microscopy
Domain wall
Nanowires
Issue Date11-Sep-2015
PublisherIOP Publishing
CitationNanotechnology 26(39): 395702 (2015)
AbstractCylindrical Fe28Co67Cu5 nanowires modulated in diameter between 22 and 35 nm are synthesized by electroplating into the nanopores of alumina membranes. High-sensitivity MFM imaging (with a detection noise of 1 μN m−1) reveals the presence of single-domain structures in remanence with strong contrast at the ends of the nanowires, as well as at the transition regions where the diameter is modulated. Micromagnetic simulations suggest that curling of the magnetization takes place at these transition sites, extending over 10–20 nm and giving rise to stray fields measurable with our MFM. An additional weaker contrast is imaged, which is interpreted to arise from inhomogeneities in the nanowire diameter.
Publisher version (URL)https://doi.org/10.1088/0957-4484/26/39/395702
URIhttp://hdl.handle.net/10261/184498
Identifiersdoi: 10.1088/0957-4484/26/39/395702
e-issn: 1361-6528
issn: 0957-4484
Appears in Collections:(ICMM) Artículos
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