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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. Ramesh
  • Adiraj Srinivas
Original Paper

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.

Keywords

Nano Ferrite Crystallite size Magnetization Far IR Anisotropy 

Notes

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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Copyright information

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

Authors and Affiliations

  • B. B. V. S. Vara Prasad
    • 1
  • K. V. Ramesh
    • 2
  • 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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