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Comparison study on magnetic property of Co0.5Zn0.5Fe2O4 powders by template-assisted sol–gel and hydrothermal methods

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Abstract

The nickel cobalt ferrite (Co0.5Zn0.5Fe2O4) nanopowders were synthesized by a sol–gel method and a hydrothermal method. Polyethylene glycol (PEG-4000) and carboxymethyl cellulose (CMC) were used as the templating agents for controlling the anisotropy and the microstructure of the Co0.5Zn0.5Fe2O4 nanopowders. The microstructure and magnetic property of the synthesized powders were comparatively studied. The results indicated that the synthesis technique and the template had remarkable dependence on the microstructure and the magnetic property of the nanopowders. The powder synthesized by the sol–gel method without any template had a maximum saturation magnetization of 73.6 emu g−1 closing to the value of the bulk material (80 emu g−1), while the PEG-4000 and CMC decreased the magnetization to 54.0 and 60.9 emu g−1. The three powders showed almost same coercivity (314–343 Oe). However, the PEG-4000 and CMC in the hydrothermal process obviously decreased and increased the coercivity respectively from 1,464 Oe to 5 Oe and 4,304 Oe but had small effect of the magnetization (55.5–59.0 emu g−1).

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Acknowledgments

The authors thank the Mr. Z. Miao of the Northwest Institute for Non-Ferrous Metal Research for his kind assistance in SEM measurement and Mr. S. Liu of the Advanced Material Analysis and Test Center of the Xi’an University of Technology for his kind assistance in magnetic property measurements.

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  1. Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi’an, 710021, Shaanxi, China

    H. Y. He

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He, H.Y. Comparison study on magnetic property of Co0.5Zn0.5Fe2O4 powders by template-assisted sol–gel and hydrothermal methods. J Mater Sci: Mater Electron 23, 995–1000 (2012). https://doi.org/10.1007/s10854-011-0535-2

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  • DOI: https://doi.org/10.1007/s10854-011-0535-2

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