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Structural and Soft Magnetic Properties of Nickel-Substituted Co-Zn Nanoferrites

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Abstract

Nickel-substituted cobalt-zinc nanoferrites (Co0.5−xZn0.5NixFe2O4, x = 0.05 to 0.25 in steps of 0.05) were synthesized in a citric acid auto-combustion method. Divalent strong paramagnetic nickel ions substituted in place of ferromagnetic cobalt ions resulted in slight modifications over structural and significant changes in magnetic properties of the system. All samples were characterized with X-ray diffraction technique for structure determination. Crystallite sizes were calculated using the Williamson-Hall plot and size-strain plots, from these lattice strain and microstrain were discussed. Transmission electron microscopy measurements were done for the base sample (x = 0), and they showed well-developed spherical particles with an average size of 35 nm. SEM micrograph was recorded for the base sample to observe surface morphology, and it was observed to be stoichiometric, as evident from EDAX measurements. Saturation magnetization, remanence, coercivity and remanence ratio were measured using M-H loops recorded using a vibrating sample magnetometer at room temperature. Magnetocrystalline anisotropy was discussed with the help of magnetocrystalline anisotropy constant (K1) obtained from the law of approach to saturation method.

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Acknowledgments

One of the authors (K V Ramesh) thankful to DST-FIST, India, for providing infrastructural facilities-(equipment) through No.SR/FST/PSI-194/2014 Dated: 21st July 2015

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Authors and Affiliations

  1. Department of Physics, MVGR College of Engineering, Vizianagaram, Andhra Pradesh, 535005, India

    B. B. V. S. Vara Prasad

  2. Department of Electronics and Physics, GITAM Institute of Science, Gandhi Institute of Technology and Management (GITAM-Deemed to be University), Visakhapatnam, Andhra Pradesh, 530045, India

    K. V. Ramesh

  3. Defence Metallurgical Research Laboratory, DRDO, Hyderabad, Telangana, 500060, India

    Adiraj Srinivas

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  1. B. B. V. S. Vara Prasad
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Correspondence to K. V. Ramesh.

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Prasad, B.B.V.S.V., Ramesh, K.V. & Srinivas, A. Structural and Soft Magnetic Properties of Nickel-Substituted Co-Zn Nanoferrites. J Supercond Nov Magn 31, 3223–3237 (2018). https://doi.org/10.1007/s10948-018-4569-z

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  • DOI: https://doi.org/10.1007/s10948-018-4569-z

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