Fabrication and magnetic behaviour of 2D ordered Fe/SiO2 nanodots array |
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| Authors: | W. Liu W. Zhong L. J. Qiu L. Y. Lü Y. W. Du |
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| Affiliation: | (1) National Laboratory of Solid State Microstructures, Jiangsu Provincial Laboratory for NanoTechnology, Nanjing University, Nanjing, 210093, P.R. China;(2) College of Science, South China Agriculture University, Guangzhou, 510642, P.R. China |
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| Abstract: | We have demonstrated a simple and universal morphology-controlled growth of 2D ordered Fe/SiO2 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/SiO2 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/SiO2 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. |
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| 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 |
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