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Microwave Absorption Properties of Radar Absorbing Nanosized Cobalt Ferrites for High Frequency Applications

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Abstract

Radar absorbing materials of nickel-cobalt ferrites (NCF) of general formula Ni(1−x)Co(x)Fe2O4 (0.0≤x≤0.5, in step of 0.1) were synthesized by the coprecipitation route. X-ray diffraction studies confirmed that all the samples exhibit the single-phase cubic spinel structure. The average particle size of as obtained samples has been found in the range of 38–41 nm. The structural morphology of the prepared samples was carried out using SEM. SEM images indicated that the final product consists of nanorods with a diameter of about 80 nm and length up to about 150 nm, and their chemical compositions were measured using the energy dispersive spectroscopy (EDS) technique. The infrared spectra are measured in the frequency range 700–350 cm−1. Furthermore, the influence of Co on the magnetic and microwave absorbance characteristics by using VSM and network analyzer of Ni(1−x)Co(x)Fe2O4 (0.0≤x≤0.5 nanoparticles has been investigated respectively in detail. Our experimental results show that the low loss Ni substituted Co ferrites is an excellent magnetic material for VHF (very high frequency: 30–300 MHz) miniature antenna applications.

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  1. School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), H-12, Islamabad, ICT, 46000, Pakistan

    Kishwar Khan

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  1. Kishwar Khan
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Correspondence to Kishwar Khan.

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Khan, K. Microwave Absorption Properties of Radar Absorbing Nanosized Cobalt Ferrites for High Frequency Applications. J Supercond Nov Magn 27, 453–461 (2014). https://doi.org/10.1007/s10948-013-2283-4

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  • DOI: https://doi.org/10.1007/s10948-013-2283-4

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