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Influence of particle size and temperature on the dielectric properties of CoFe2O4 nanoparticles

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Abstract

The objective of this study was to establish the dielectric properties of CoFe2O4 nanoparticles with particle sizes that varied from 28.6 to 5.8 nm. CoFe2O4 nanoparticles were synthesized using a chemical coprecipitation method. The particle sizes were calculated according to the Scherrer formula using X-ray diffraction (XRD) peaks, and the particle size distribution curves were constructed by using field-emission scanning electron microscopy (FESEM) images. The dielectric permittivity and loss tangents of the samples were determined in the frequency range of 1 kHz to 1 MHz and in the temperature range of 300 to 10 K. Both the dielectric permittivity and the loss tangent were found to decrease with increasing frequency and decreasing temperature. For the smallest CoFe2O4 nanoparticle size, the dielectric permittivity and loss tangent exhibited their highest and lowest values, respectively. This behavior is very useful for materials used in devices that operate in the microwave or radio frequency ranges.

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Authors and Affiliations

  1. NIIT University, Neemrana, 301705, Raj., India

    Deepshikha Rathore & R. K. Pandey

  2. Department of Physics, Maulana Azad National Institute of Technology (MANIT), Bhopal, 462051, M.P., India

    Rajnish Kurchania

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  1. Deepshikha Rathore
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  2. Rajnish Kurchania
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  3. R. K. Pandey
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Correspondence to Deepshikha Rathore.

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Rathore, D., Kurchania, R. & Pandey, R.K. Influence of particle size and temperature on the dielectric properties of CoFe2O4 nanoparticles. Int J Miner Metall Mater 21, 408–414 (2014). https://doi.org/10.1007/s12613-014-0923-8

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  • DOI: https://doi.org/10.1007/s12613-014-0923-8

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