The Effects of Doping on Crystal Structure, Magnetic and Microwave Properties of SrFe12−2x La x (Mn0.5Zr0.5) x O19 Nanoparticles

  • Esmail Kiani
  • Amir S. H. Rozatian
  • Mohammad H. Yousefi
Original Paper


M-type hexagonal ferrite powders, SrFe12−2x La x (Mn0.5Zr0.5) x O19 (x=0.0, 0.2, 0.4, 0.6, 0.8), have been synthesized by the coprecipitation method. The X-ray diffraction, field emission scanning electron microscope, vibrating sample magnetometer and vector network analyzer all were used to characterize the structure of the samples, their magnetic and microwave properties. The value of the saturation magnetization increased up to x=0.2 and then slowly decreased with increasing doping. A decreasing trend was observed in the value of coercivity with increasing substitution degree, and its value reached a minimum of 2420 Oe for x=0.6 and then increased with further increasing x. The relative complex permittivity and permeability of the composite powders were investigated in the X-band frequency range (8.2–12.4 GHz).


M-type hexaferrites Magnetic properties Rare-earth Microwave properties 



The authors would like to thank the Office of Graduate Studies of the University of Isfahan for their support. E. Kiani would like to thank the Iranian Nanotechnology Initiative Council for their support.


  1. 1.
    Carey, R., Gago-Sandoval, P.A., Newman, D.M., Thomas, B.W.J.: J. Appl. Phys. 75, 6789–6791 (1994) ADSCrossRefGoogle Scholar
  2. 2.
    Samaras, D., Georgiou, J., Panasl, S., Litsardakisl, G.: IEEE Trans. Magn. 26, 18–20 (1990) ADSCrossRefGoogle Scholar
  3. 3.
    Tabatabaie, F., Fathi, M.H., Saatchi, A., Ghasemi, A.: J. Alloys Compd. 470, 332–335 (2009) CrossRefGoogle Scholar
  4. 4.
    Smit, J., Wijn, H.P.J.: Ferrites. Wiley, New York (1957) Google Scholar
  5. 5.
    Hussain, S., Shah, N., Maqsood, A., Ali, A., Naeem, M., Ahmad Adil Syed, W.: J. Supercond. Nov. Magn. 24(4), 1245–1248 (2011). doi: 10.1007/s10948-010-1115-z CrossRefGoogle Scholar
  6. 6.
    Guerrero-Serrano, A., Pérez-Juache, T., Mirabal-García, M., Matutes-Aquino, J., Palomares-Sánchez, S.: J. Supercond. Nov. Magn. 24(3), 2307–2312 (2011). doi: 10.1007/s10948-011-1181-x CrossRefGoogle Scholar
  7. 7.
    Stergiou C, A., Manolakis, I., Yioultsis T, V., Litsardakis, G.: J. Magn. Magn. Mater. 322, 1532–1535 (2010) ADSCrossRefGoogle Scholar
  8. 8.
    Corral-Huacuz, J.C., Mendoza-Suarez, G.: J. Magn. Magn. Mater. 242, 430–433 (2002) ADSCrossRefGoogle Scholar
  9. 9.
    Rai, G.M., Iqbal, M.A., Kubra, K.T.: J. Alloys Compd. 495, 229–233 (2010) CrossRefGoogle Scholar
  10. 10.
    Lee, S.W., An, S.Y., Shim, I.-B., Kim, C.S.: J. Magn. Magn. Mater. 290, 231–233 (2005) ADSCrossRefGoogle Scholar
  11. 11.
    Kim, C.S., An, S.Y., Son, J.H., Lee, J.G.: J. Appl. Phys. 91, 8465–8467 (2002) ADSCrossRefGoogle Scholar
  12. 12.
    Koops, C.G.: Phys. Rev. 83(1), 121–124 (1951) ADSCrossRefGoogle Scholar
  13. 13.
    Chikazumi, S., Charap, S.H.: In: Physics of Magnetism. Wiley, New York (1964), p. 327 Google Scholar
  14. 14.
    Singh, P., Babbar, V., Razdan, A., Srivastava, S., Agrawal, V., Goel, T.: J. Mater. Sci. 41(21), 7190–7196 (2006). doi: 10.1007/s10853-006-0921-y ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Esmail Kiani
    • 1
  • Amir S. H. Rozatian
    • 1
  • Mohammad H. Yousefi
    • 1
  1. 1.Department of PhysicsUniversity of IsfahanIsfahanIran

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