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Title

Exchange bias in laterally oxidized Au/Co/Au nanopillars

AuthorsBalcells Argemi, Lluis; Martínez Perea, Benjamín CSIC ORCID; Iglesias-Freire, Óscar CSIC ORCID; García-Martín, José Miguel CSIC ORCID ; Cebollada, Alfonso CSIC ORCID; García-Martín, Antonio CSIC ORCID ; Armelles Reig, Gaspar CSIC ORCID; Sepúlveda, Borja CSIC ORCID; Alaverdyan, Yury
KeywordsAntiferromagnetic materials
Cobalt
Coercive force
Colloids
Exchange interactions (electron)
Ferromagnetic materials
Issue Date9-Feb-2009
PublisherAmerican Institute of Physics
CitationApplied Physics Letters 94(6): 062502 (2009)
AbstractAu/Co/Au nanopillars fabricated by colloidal lithography of continuous trilayers exhibit an enhanced coercive field and the appearance of an exchange bias field with respect to the continuous layers. This is attributed to the lateral oxidation of the Co interlayer that appears upon disk fabrication. The dependence of the exchange bias field on the Co nanodots size and on the oxidation degree is analyzed and its microscopic origin clarified by means of Monte Carlo simulations based on a model of a cylindrical dot with lateral core/shell structure.
Description3 pages, 4 figures.-- PACS: 75.30.Et; 75.50.Tt; 81.16.Nd; 61.46.Df; 75.60.Ej; 75.50.Ee
Publisher version (URL)http://dx.doi.org/10.1063/1.3078411
URIhttp://hdl.handle.net/10261/21576
DOI10.1063/1.3078411
ISSN0003-6951
Appears in Collections:(IMN-CNM) Artículos
(ICMAB) Artículos

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