Fabrication and magnetic behaviour of 2D ordered Fe/SiO 2 nanodots array

W. Liu, W. Zhong (), L. J. Qiu, L. Y. Lü and Y. W. Du

The European Physical Journal B: Condensed Matter and Complex Systems, 2006, vol. 51, issue 4, 501-506

Abstract: We have demonstrated a simple and universal morphology-controlled growth of 2D ordered Fe/SiO 2 magnetic nanodots array, which was based on 2D colloidal monolayer template composed of polystyrene (PS) spheres and one-step sol-gel spin-coating technique. The Fe/SiO 2 nanodots have a well-ordered structure arranged in a hexagonal pattern. The dots have the shape of quasi-pyramidal tetrahedron, which reside in the interstitial region between three PS spheres and the substrate. Magnetic measurements reveal that the nanodots array exhibits the in-plane easy magnetization direction. Compared with the unpatterned Fe/SiO 2 thin film, the dots array has lower saturated field, higher remanence and coercivity. The present method is applicable to 2D ordered nanodots array of other magnetic materials. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Keywords: 75.50.Bb Fe and its alloys; 75.75.+a Magnetic properties of nanostructures; 81.07.-b Nanoscale materials and structures: fabrication and characterization (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1140/epjb/e2006-00250-6

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