Applied physics

, Volume 3, Issue 3, pp 229–234 | Cite as

Dielectric properties of polycrystalline ferrites

  • H. Dülken
Contributed Papers


The well-known dielectric relaxation of polycrystalline ferrites is usually seen as being related to an inhomogeneous polarization. According to that theory, the inhomogeneities are formed by poorly conducting grain boundaries in the well-conducting bulk material. Experimental results reported here suggest, that in some cases the dispersions are not due to an inhomogeneity polarization. Previously reported results of measurements taken on single crystals are also inconsistent with this model. Therefore an electric dipole relaxation model is introduced.

Index Headings

Ferrites Dielectric relaxation 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    E. Blechschmidt: Phys. Z.39, 212 (1938)Google Scholar
  2. 2.
    K. Kamiyoshi: Sci. Rep. Res. Inst. Tohoku Univ. A3, 716 (1951)Google Scholar
  3. 3.
    C.G. Koops: Phys. Rev.83, 121 (1951)CrossRefADSGoogle Scholar
  4. 4.
    F. Haberey, H.P.J. Wijn: Phys. Stat. Sol.26, 231 (1968)Google Scholar
  5. 5.
    J. Krausse: Z. Angew. Phys.27, 251 (1969)Google Scholar
  6. 6.
    J.C.F. Böttcher:Theory of Electric Polarisation (Elsevier Publishing Comp., Amsterdam 1952).MATHGoogle Scholar
  7. 7.
    H. Fröhlich:Theory of Dielectrics (Clarendon Press, Oxford 1949)Google Scholar
  8. 8.
    N.F. Mott, R.W. Gurney:Electronic Processes in Ionic Crystals (Oxford University Press, London 1948)Google Scholar
  9. 9.
    H. Dülken: Thesis, RWTH Aachen, Germany 1971Google Scholar
  10. 10.
    P. Dullenkopf, H.P.J. Wijn: Z. Angew. Phys.26, 22 (1969)Google Scholar
  11. 11.
    V.A. Ioffe, G.I. Khvostenko, Z.N. Zonn: J. Tech. Phys.27, 184 (1957)Google Scholar
  12. 12.
    E. Vollmerhaus: private communicationGoogle Scholar

Copyright information

© Springer-Verlag 1974

Authors and Affiliations

  • H. Dülken
    • 1
  1. 1.Institut für Werkstoffe der ElektrotechnikRheinisch-Westfälische Technische HochschuleAachenFed. Rep. Germany

Personalised recommendations