Journal of Superconductivity and Novel Magnetism

, Volume 31, Issue 10, pp 3223–3237 | Cite as

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

  • B. B. V. S. Vara Prasad
  • K. V. RameshEmail author
  • Adiraj Srinivas
Original Paper


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.


Nano Ferrite Crystallite size Magnetization Far IR Anisotropy 



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


  1. 1.
    Yadav, R.S., et al.: Magnetic properties of Co1−xZnxFe2 O 4 spinel ferrite nanoparticles synthesized by starch-assisted sol–gel auto combustion method and its ball milling. J. Magn. Magn. Mater. 378(15), 190–199 (2015)ADSCrossRefGoogle Scholar
  2. 2.
    Kotsikau, D., et al.: Structure and magnetic properties of manganese zinc-ferrites prepared by spray pyrolysis method. Solid State Sci. 39, 69–73 (2015)ADSCrossRefGoogle Scholar
  3. 3.
    Akhtar, M.N., et al.: Evaluation of structural, morphological and magnetic properties of CuZnNi (CuxZn0.5−xNi0.5Fe2 O 4) nanocrystalline ferrites for core, switching and MLCI’s applications. J. Magn. Magn. Mater. 421(1), 260–268 (2017)ADSCrossRefGoogle Scholar
  4. 4.
    Ashiq, M.N., et al.: Role of Co–Cr substitution on the structural, electrical and magnetic properties of nickel nano-ferrites synthesized by the chemical co-precipitation method. Mater. Res. Bull. 47(3), 683–686 and references therein (2012)CrossRefGoogle Scholar
  5. 5.
    Vara Prasad, B.B.V.S., Ramesh, K.V., Srinivas, A.: Structural and magnetic studies of nano-crystalline ferrites MFe2 O 4 (M = Zn, Ni, Cu, and Co) synthesized via citrate gel auto-combustion method. J. Supercond. Nov. Magn. (2017). CrossRefGoogle Scholar
  6. 6.
    Fiorillo, F.: Anisotropy and magnetization process in soft magnets: principles, experiments, applications. J. Magn. Magn. Mater. 304, 139–144 (2006)ADSCrossRefGoogle Scholar
  7. 7.
    Vara Prasad, B.B.V.S, Ramesh, K.V., Srinivas, A.: Structural and magnetic studies on Co-Zn nanoferrite synthesized via sol-gel and combustion methods. Mater. Sci-Pol. accepted (2017)Google Scholar
  8. 8.
    Raut, A.V., Barkule, R.S., Shengule, D.R., Jadhav, K.: Synthesis, structural investigation and magnetic properties of Zn2+ substituted cobalt ferrite nano particles prepared by the sol–gel auto-combustion technique. J. Magn. Magn Mater. 358–359, 87–92 (2014)ADSCrossRefGoogle Scholar
  9. 9.
    Singhal, S., Sharma, R., et al.: Structural, electrical and magnetic properties of Co0.5,Zn0.5AlxFe2−x O 4 (x = 0, 0.2, 0.4, 0.6, 0.8 and 1.0) prepared via sol–gel route. Ceram. Int. 38, 2773–2778 (2012)CrossRefGoogle Scholar
  10. 10.
    Sivaram Prasad, M., Prasad, B.B.V.S.V., Rajesh, B.B., Rao, K.H., Ramesh, K.V.: Magnetic properties and DC electrical resistivity studies on cadmium substituted nickel–zinc ferrite system. J. Magn. Magn. Mater. 323 (16), 2115–2121 (2011)ADSCrossRefGoogle Scholar
  11. 11.
    Vara Prasad, B.B.V.S., et al.: Structural and dielectric studies of mg2+ substituted Ni–Zn ferrite. Mater. Sci-Poland 33(4), 806–815 (2015)CrossRefGoogle Scholar
  12. 12.
    Shannon, R.D.: Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallogr. A 32, 751–767 (1976)ADSCrossRefGoogle Scholar
  13. 13.
    Maniammal, K., Madhu, G., Bijua, V.: X-ray diffraction line profile analysis of nano structured nickel oxide: shape factor and convolution of crystallite size and micro-strain contributions. Phys. E. 85, 214–222 (2017)CrossRefGoogle Scholar
  14. 14.
    Deraz, N. M., Alarifi, A.: Structural, morphological and magnetic properties of nano-crystalline zinc substituted cobalt ferrite system. J. Anal. Appl. Pyrolysis 94, 41–47 (2012)CrossRefGoogle Scholar
  15. 15.
    Rana, K., Thakur, P., Arul Sharma, P., Tomar, M., Gupta, V., Thakur, A.: Improved structural and magnetic properties of cobalt nanoferrites: influence of sintering temperature. Ceram. Int. 41, 4492–4497 (2015)CrossRefGoogle Scholar
  16. 16.
    Slonczewski, J.C.: Origin of magnetic anisotropy in cobalt-substituted magnetite. Phys. Rev. 116(6), 1341–1348 (1958)ADSCrossRefGoogle Scholar
  17. 17.
    Kumar, L., Kumar, P., Kar, M.: Cation distribution by Rietveld technique and magneto-crystalline anisotropy of Zn substituted nanocrystalline cobalt ferrite. J. Alloys Compd. 551, 72–81 (2013)CrossRefGoogle Scholar
  18. 18.
    Kumar, L., Kar, M.: Influence of Al3+ ion concentration on the crystal structure and magnetic anisotropy of nanocrystalline spinel cobalt ferrite. J. Magn. Magn. Mater. 323(16), 2042–20482121 (2011)ADSCrossRefGoogle Scholar

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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • B. B. V. S. Vara Prasad
    • 1
  • K. V. Ramesh
    • 2
    Email author
  • Adiraj Srinivas
    • 3
  1. 1.Department of PhysicsMVGR College of EngineeringVizianagaramIndia
  2. 2.Department of Electronics and Physics, GITAM Institute of ScienceGandhi Institute of Technology and Management (GITAM-Deemed to be University)VisakhapatnamIndia
  3. 3.Defence Metallurgical Research LaboratoryDRDOHyderabadIndia

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