Abstract
Powders with particle size ∼5–15 nm of nickel ferrite have been synthesized chemically from aqueous precursor solutions. From the structural and magnetic properties, it is determined that the synthetic material possesses high NiFe2O4 phase purity and controllable particle size. The optimum calcination temperature is found to be ∼500 °C, at which the NiFe2O4 particles exhibit a saturation magnetization of 2800 G, and a particle size of about 10 nm. The particles are then deposited onto silicon substrates by electrophoretic deposition (EPD) process. The Ni ferrite particles are suspended in a medium of isopropyl alcohol with magnesium nitrate and lanthanum nitrate salts as charging agents. The transportation of particles to the substrate surface is assisted by applied electric field and particles adhere to the substrate surface by a glycerol based surfactant. The magnetic response of the EPD film has been investigated by vibrating sample magnetometer (VSM) measurements.
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Acknowledgements
This work was supported in part by the National Science Foundation under the Grant Number ECS-021937. The authors are grateful to the US Air Force support under an SBIR Phase II Contract F29601-02-C-0031. The authors thank Dr. Y.D. Zhang of Inframat Corporation for performing the magnetic measurements of the as-synthesized powders.
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Kurinec, S.K., Okeke, N., Gupta, S.K. et al. Synthesis and electrophoretic deposition of magnetic nickel ferrite nanoparticles. J Mater Sci 41, 8181–8185 (2006). https://doi.org/10.1007/s10853-006-0393-0
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DOI: https://doi.org/10.1007/s10853-006-0393-0