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Sol-gel synthesis of Fe-Co nanoparticles and magnetization study

Abstract : We report the synthesis of carbon encapsulated Fe-Co nanoparticles using conventional sol-gel route and its magnetization studies. The x-ray diffraction indicates the formation of the single phase body centered cubic alloy Fe-Co phase with cell parameter of 2.857 Å. Nanoparticles are highly crystalline and exhibit low index faceting as determined from high-resolution transmission electron microscopy (HRTEM) investigation. The observed orthogonal lattice planes with lattice distance of 2.86 Å are attributed to (100) and (010). HRTEM image confirms the cube like Fe-Co nanoparticles with core-shell structure of carbon encapsulation, composed of carbon and graphite materials. The magnetometry results of the carbon encapsulated alloy Fe-Co nanoparticles with core-shell structure designate as a ferromagnetically ordered soft magnet with coercive field of 890 Oe (at 5 K). The coercive field and magnetization value depend on the size of nanoparticles as well as the diamagnetic contribution of carbon encapsulation. © 2014 Elsevier B.V. All rights reserved.
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Submitted on : Monday, July 15, 2019 - 6:05:01 PM
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P. Nautiyal, M.M. Seikh, O.I. Lebedev, A.K. Kundu. Sol-gel synthesis of Fe-Co nanoparticles and magnetization study. Journal of Magnetism and Magnetic Materials, Elsevier, 2015, 377, pp.402-405. ⟨10.1016/j.jmmm.2014.10.157⟩. ⟨hal-02184129⟩



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