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Tailoring the magnetic properties of cobalt-ferrite nanoclusters

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Abstract

In this contribution, we report on the tuning of magnetic properties of cobalt-ferrite nanoclusters. The cobalt-ferrite nanoclusters were synthesized from a two-step approach that consists of the synthesis of cobalt-ferrite nanoparticles in organic media, followed by their dispersion into aqueous dissolution to form an oil-in-water emulsion. These emulsions were prepared at three different concentrations of the cationic surfactant cetyltrimethylammonium bromide (CTAB), in order to control the size and clustering density of the nanoparticles in the nanoclusters. The synthesized samples were characterized by transmission electron microscopy and their related techniques, such as bright-field and Z-contrast imaging, electron diffraction and energy-dispersive X-ray spectrometry; as well as static magnetic measures. The experimental evidence indicates that the size, morphology, and nanoparticles clustering density in the nanoclusters is highly dependent of the cobalt-ferrite:CTAB molar ratio that is used in their synthesis. In addition, due to the clustering of the nanoparticles into the nanoclusters, their magnetic moments are blocked to relax cooperatively. Hence, the magnetic response of the nanoclusters can be tailored by controlling the size and nanoparticles clustering density.

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Acknowledgments

This research was supported by CONACYT, project number 153482, and by PAICYT-UANL fund, project number IT686-11.

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Authors and Affiliations

  1. Facultad de Ingeniería Mecánica y Eléctrica, Universidad Autónoma de Nuevo León, Av. Universidad s/n, Cd. Universitaria, San Nicolás de los Garza, 66455, San Nicolás de los Garza, Nuevo León, Mexico

    A. Estrada de la Vega, M. A. Garza-Navarro, J. G. Durán-Guerrero, I. E. Moreno Cortez, R. Lucio-Porto & V. González-González

  2. Centro de Innovación, Investigación y Desarrollo en Ingeniería y Tecnología, Universidad Autónoma de Nuevo León, 66600, Apodaca, Nuevo León, Mexico

    M. A. Garza-Navarro, I. E. Moreno Cortez, R. Lucio-Porto & V. González-González

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  1. A. Estrada de la Vega
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  2. M. A. Garza-Navarro
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  3. J. G. Durán-Guerrero
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  4. I. E. Moreno Cortez
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  5. R. Lucio-Porto
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  6. V. González-González
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Correspondence to M. A. Garza-Navarro.

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de la Vega, A.E., Garza-Navarro, M.A., Durán-Guerrero, J.G. et al. Tailoring the magnetic properties of cobalt-ferrite nanoclusters. J Nanopart Res 18, 18 (2016). https://doi.org/10.1007/s11051-016-3325-1

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