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Influence of Nd-Co Substitution on Structural, Electrical, and Dielectric Properties of X-Type Hexagonal Nanoferrites

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Abstract

A series of single phase X-type hexagonal ferrites with concentration Sr2−x Nd x Ni2Fe28−y Co y O46 (x = 0.02, 0.04, 0.06, 0.08, 0.10 and y = 0.1, 0.2, 0.3, 0.4, 0.5) has been prepared by sol-gel method sintered at 1250 °C for 6 h. The x-ray diffraction analysis reveals the single phase of X-type hexagonal ferrites. The particle size was calculated by using SEM and TEM. The ferrite substituted with Nd3+ and Co2+ has average particle size in the range of 40-50 nm. The room temperature electrical resistivity experiences the significant enhancement from a value of 1.1 × 107 to 2.03 × 108 Ωcm with the increase in Nd3+ and Co2+ concentration. The dielectric constant exhibits high value at low frequencies and decreases with the increase of frequency. The tangent dielectric loss shows the abnormal behavior which can be explained on the basis of hopping between the Fe2+ and Fe3+ ions on octahedral sites. The maximum value of tangent loss at low frequencies reflects the application of these materials in medium frequency devices (MF).

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Acknowledgments

One of the authors (Imran Sadiq) is thankful to the Higher Education Commission of Pakistan for the financial support in this project. The author appreciates the support of Dr. Shahzad Naseem, Punjab University Lahore, Pakistan for providing electrical measurements facilities.

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Authors and Affiliations

  1. Department of Physics, Bahauddin Zakariya University, Multan, 60800, Pakistan

    Imran Sadiq, Irshad Ali & M. U. Rana

  2. School of Chemistry and Chemical Engineering, Queen’s University Belfast, Belfast, UK

    Evgeny V. Rebrov

  3. Centre for Solid State Physics, University of Punjab, Lahore, Pakistan

    Shahzad Naseem

  4. Institute of Chemical Sciences, Bahauddin Zakariya University, Multan, 60800, Pakistan

    M. Naeem Ashiq

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  1. Imran Sadiq
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  2. Irshad Ali
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  5. M. Naeem Ashiq
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Correspondence to Imran Sadiq.

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Sadiq, I., Ali, I., Rebrov, E.V. et al. Influence of Nd-Co Substitution on Structural, Electrical, and Dielectric Properties of X-Type Hexagonal Nanoferrites. J. of Materi Eng and Perform 23, 622–627 (2014). https://doi.org/10.1007/s11665-013-0758-x

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  • DOI: https://doi.org/10.1007/s11665-013-0758-x

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