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Influence of Nanocrystalline Ferrite Particles on Properties of Magnetic Systems

  • Robert Müller
  • Tobias Habisreuther
  • Robert Hiergeist
  • Hanna Steinmetz
  • Matthias Zeisberger
  • Wolfgang Gawalek
Chapter
Part of the Lecture Notes in Physics book series (LNP, volume 593)

Abstract

Nanocrystalline mainly superparamagnetic ferrite particles ≈ 10nm are used for the preparation of magnetic fluids. Barium hexaferrite BaFe12−2x TixCoxO19 powders with mean particle sizes < 30nm show the transition to single domain Stoner- Wohlfarth behaviour. Hysteresis parameters, losses and the initial susceptibility versus temperature were obtained by VSM. Ba-ferrite ferrofluids have been prepared using Isopar M or dodecane as carrier liquid. Small Angle Neutron Scattering curves lead to a bimodal size distribution consisting of single magnetic particles and aggregated magnetic particles. Particle size investigations were done by TEM.

Keywords

Magnetic Particle Magnetic System Carrier Liquid Ferrite Particle Bimodal Size Distribution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Toshiba Review No. 154, Winter, 1985, 5–31Google Scholar
  2. 2.
    R. Müller et al. Proceed. ELECTROCERAMICS IV 1994 Aachen, vol. II, 1183Google Scholar
  3. 3.
    E.C. Stoner and E.P. Wohlfarth, Phil. Trans. Roy. Soc. 240A (1948) 599CrossRefADSGoogle Scholar
  4. 4.
    Th. Klupsch, Phys. Stat. Sol. 113 (1989) 561–572CrossRefADSGoogle Scholar
  5. 5.
    A. Cebers, Magnetohydrodyn. 11(4) (1975) 439Google Scholar
  6. 6.
    R. Müller, et al. J. Magn. Magn. Mater. 201 (1999) 34CrossRefADSGoogle Scholar
  7. 7.
    H. Pfeiffer, R. W. Chantrell, J. Magn. Magn. Mater. 120 (1993) 203CrossRefADSGoogle Scholar
  8. 8.
    E. Kneller, “Ferromagnetismus”, Springer, Berlin, 1962, 427zbMATHGoogle Scholar
  9. 9.
    R. Müller et al., J. Magn. Magn. Mater. acceptedGoogle Scholar
  10. 10.
    E. Pytte, Y. Imry, Phys. Rev. B 35 (1987) 1465CrossRefADSGoogle Scholar
  11. 11.
    Yu. L. Raikher, A.F. Pshenichnikov JETP Lett., 41 (1985) 132ADSGoogle Scholar
  12. 12.
    M. Kishimoto, Shin-ichi Kitahata, IEEE Trans. Magn. 25 (1989) 4063CrossRefADSGoogle Scholar
  13. 13.
    A. Hoell et al., J. Magn. Magn. Mater. acceptedGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • Robert Müller
    • 1
  • Tobias Habisreuther
    • 1
  • Robert Hiergeist
    • 1
  • Hanna Steinmetz
    • 1
  • Matthias Zeisberger
    • 1
  • Wolfgang Gawalek
    • 1
  1. 1.Institut für Physikalische Hochtechnologie e.V.JenaGermany

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