Abstract
Ho3Fe5O12 ceramics were fabricated by the solid-state reaction method. The results revealed an increase of the grain size, dielectric constant, and dielectric loss, while a decrease of the remnant magnetization and coercive field with increasing sintering temperature. A dielectric relaxation behavior was observed, which might be associated with the charge carrier hopping between Fe2+ and Fe3+. A cole–cole fitting to loss peaks revealed a dependence of the activation energy and the broaden factor on the relative density of the samples. Furthermore, at appropriate frequencies, the 1250 °C-sintered samples showed high dielectric constant, low dispassion, and good temperature stability around room temperature.
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Acknowledgements
This study was supported by the National Science Foundation (no. 50672034 and 50972056), and 973 Project of MOST (Grant no. 2009CB623303 and 2009CB929501).
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Su, J., Lu, X., Zhang, C. et al. The effect of sintering temperature on magnetic and dielectric properties of Ho3Fe5O12 ceramics. J Mater Sci 46, 3488–3492 (2011). https://doi.org/10.1007/s10853-011-5254-9
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DOI: https://doi.org/10.1007/s10853-011-5254-9