Effect of Zn Substitution on the Magnetic Properties of Cobalt Ferrite Nano Particles Prepared Via Sol-Gel Route
Sonal Singhal, Tsering Namgyal, S. Bansal, Kailash Chandra
DOI: 10.4236/jemaa.2010.26049   PDF    HTML     11,743 Downloads   23,933 Views   Citations


Zinc substituted cobalt ferrite nanoparticles (CoxZn1-xFe2O4, with x = 0.0, 0.2, 0.4, 0.8 and 1.0) were prepared via sol-gel route and the effect of zinc concentration on saturation magnetization and lattice parameter were investigated. The particle sizes of the as obtained samples were found to be ~10 nm which increases upto ~92 nm on annealing at 1000oC. The frequency bands near 564-588 cm-1 and 425-442 cm-1 are assigned to the tetrahedral and octahedral clusters which confirm the presence of M-O stretching band in ferrites. The unit cell parameter ‘a’ increases linearly with increasing concentration of zinc due to larger ionic radii of Zn2+ ion . It was found that this substitution allows tunable changes in the magnetic properties of cobalt ferrite. Interestingly, saturation magnetization first increases upto x = 0.4 and then decreases for higher Zn substitution, thus tunable changes in magnetic properties of cobalt ferrite are possible. Source of such behaviour could be the variation of exchange interaction between the tetrahedral and the octahedral sites.

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S. Singhal, T. Namgyal, S. Bansal and K. Chandra, "Effect of Zn Substitution on the Magnetic Properties of Cobalt Ferrite Nano Particles Prepared Via Sol-Gel Route," Journal of Electromagnetic Analysis and Applications, Vol. 2 No. 6, 2010, pp. 376-381. doi: 10.4236/jemaa.2010.26049.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] K. Raj, R. Moskowitz and R. Casciari, “Advances in Ferrofluid Technology,” Journal of Magnetism and Magnetic Materials, Vol. 149, No. 1-2, 1995, pp. 174-180.
[2] R. Valenzuela, “Magnetic Ceramics,” Cambridge University Press, Cambridge, 1984, pp. 191-212.
[3] D. S. Mathew and R.-S. Juang, “An Overview of Structure and Magnetism of Spinel Ferrite Nanoparticles and their Synthesis in Microemulsions,” Journal of Chemical Engineering, Vol. 129, No. 1-3, 2007, pp. 51-65.
[4] A. Tawfik, I. M. Hamada, O. M. Hemeda, “Effect of Laser Irriadiation on the Structure and Electromechanical Properties of Co-Zn Ferrite,” Journal of Magnetism and Magnetic Materials, Vol. 250, 2002, pp. 77-82.
[5] S. Dey and J. Ghose, “Synthesis, Characterization and Magnetic Studies on Nanocrystalline Co0.2Zn0.8Fe2O4,” Materials Research Bulletin, Vol. 38, No. 11-12, 2003, pp. 1653-1660.
[6] R. Arulmurugan, B. Jeyadevan, G. Vaidyanathan and S. Sendhilnathan, “Effect of Zinc Substitution on Co-Zn and Mn-Zn Ferrite Nanoparticles Prepared by Co-Precipitation,” Journal of Magnetism and Magnetic Materials, Vol. 288, 2005, pp. 470-477.
[7] M. U. Islam, M. U. Rana and T. Abbbas, “Study of Magnetic Interactions in Co-Zn-Fe-O System,” Materials Chemistry and Physics, Vol. 57, No. 2, 1998, pp. 190- 193.
[8] G. Vaidyanathan, S. Sendhilnathan, R. Arulmurgan, “Structural and Magnetic Properties of Co1-xZnxFe2O4 Nanoparticles by Co-Precipitation Method,” Journal of Magnetism and Magnetic Materials, Vol. 313, No. 2, 2007, pp. 293-299.
[9] G. V. Duong, N. Hanh, D. V. Linh, R. Groessinger, P. Weinberger, E. Schafler and M. Zehetbauer, “Monodispersed Nanocrystalline Co1-xZnxFe2O4 Particles by Forced Hydrolysis: Synthesis and Characterization,” Journal of Magnetism and Magnetic Materials, Vol. 311, No. 1, 2007, pp. 46-50.
[10] S. B. Waje, M. Hashim, W. D. W. Yousoff and Z. Abbas, “Sintering Temperature Dependence of Room Temperature Magnetic and Dielectric Properties of Co0.5Zn0.5 Fe2O4 Prepared Using Mechanically Alloyed Nanoparticles,” Journal of Magnetism and Magnetic Materials, Vol. 322, No. 6, 2010, pp. 686-691.
[11] A. Pradeep, G. Chandrasekaran, “FTIR Study of Ni, Cu and Zn Substituted Nanoparticles of MgFe2O4,” Material Letters, Vol. 60, No. 3, 2006, pp. 371-374.
[12] H. P. Klug and L. E. Alexender, “X-Ray Diffraction Procedures for Polycrystalline and Amorphous Materials,” Chapter 9, 2nd Edition, Wiley, 1974.
[13] N. Hanh, O. K. quy, N. P. Thuy, L. D. Tung and L. Spinu; “Synthesis of Cobalt Ferrite Nanocrystallites by Forced Hydrolysis Method and Investigation of their Magnetic Properties,” Physica B, Vol. 327, No. 2, 2003, pp. 382- 384.
[14] Y. Shi, J. Ding and H. Yin, “CoFe2O4 Nanoparticles Prepared by the Mechanical Method,” Journal of Alloys and Compounds, Vol. 308, No. 1, 2000, pp. 290-295.
[15] B. D. Cullity, “Introduction to Magnetic Materials,” Addison-Wesely Publishing Company Inc., Reading MA, 1972.
[16] S. Chikazumi, “Physics of Magnetism,” Wiley, New York, 1959.
[17] M. George, A. M. John, S. S. Nair, P. A. Joy and M. R. Anantharaman, “Finite Size Effects on the Structural and Magnetic Properties of Sol-Gel Synthesized NiFe2O4 Powders,” Journal of Magnetism and Magnetic Materials, Vol. 302, No. 1, 2006, pp. 190-195.
[18] Y. M. Yakovlev, E. V. Rubalikaya and N. Lapovok, “Fe- rromagnetic Resonance in Lithium Ferrite,” Soviet Physics-Solid State, Vol. 10, 1969, pp. 2301-2303.
[19] H. K. Jun, J. H. Koo and T. J. Lee, “Study of Zn-Ti Based H2S Removal Sorbents Promoted Co and Ni Oxides,” Energy Fuels, Vol. 18, No. 1, 2004, pp. 41-48.

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