Advertisement

Zeitschrift für Physik B Condensed Matter

, Volume 71, Issue 3, pp 355–368 | Cite as

On the critical dynamics of ferromagnets

  • E. Frey
  • F. Schwabl
Article

Abstract

The dynamic scaling functions for ferromagnets above and below the critical temperature are determined using mode coupling theory. Below the critical temperature we study isotropic ferromagnets taking into account the exchange interaction only and give the first numerical solution of the resulting mode coupling equations. In the paramagnetic phase we examine how the critical dynamics is modified by the addition of the dipoledipole interaction. On the basis of this theory we are able to explain in a unifying fashion the results of different experimental methods; i.e.: neutron scattering, hyperfine interaction and electron-spin resonance. Predictions for new experiments are made.

Keywords

Spectroscopy Neural Network State Physics Complex System Experimental Method 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Resibois, P., Piette, C.: Phys. Rev. Lett.24, 514 (1970)Google Scholar
  2. 2.
    Aharony, A., Fisher, M.E.: Phys. Rev. B8, 3323 (1973)Google Scholar
  3. 3.
    Frey, E., Schwabl, F.: Phys. Lett. A123, 49 (1987)Google Scholar
  4. 4.
    Mori, H.: Progr. Theor. Phys.33, 423 (1965);34 399 (1965)Google Scholar
  5. 5.
    Kawasaki, K.: Progr. Theor. Phys.39, 285 (1968); Ann Phys.61, 1 (1970); In: Phase transitions and critical phenomena, Vol. 5a. Domb, C., Green, M. (eds.). New York, London: Academic Press 1976Google Scholar
  6. 6.
    Hubbard, J.: J. Phys. C4, 53 (1971)Google Scholar
  7. 7.
    Schwabl, F.: Z. Phys.246, 13 (1971)Google Scholar
  8. 8.
    Mazenko, G.F.: Phys. Rev. B14, 3933 (1976)Google Scholar
  9. 9.
    Iro, H.: Z. Phys. B — Condensed Matter68, 485 (1987)Google Scholar
  10. 10.
    Bhattacharjee, J.K., Ferrell, R.A.: J. Stat. Phys.41, 899 (1985)Google Scholar
  11. 11.
    Ma, S., Mazenko, G.F.: Phys. Rev. B11, 4077 (1975)Google Scholar
  12. 12.
    Sasvári, L.: J. Phys. C10, L633 (1977)Google Scholar
  13. 13.
    Collins, M.F., Minkiewicz, V.J., Nathans, R., Passell, L., Shirane, G.: Phys. Rev.179, 417 (1969)Google Scholar
  14. 14.
    Collins, M.F., Minkiewicz, V.J., Nathans, R., Shirane, G.: Phys. Rev.182, 624 (1969)Google Scholar
  15. 15.
    Dietrich, O.W., Als-Nielsen, J., Passell L.: Phys. Rev. B14, 4923 (1976)Google Scholar
  16. 16.
    Mitchell, P.W., Cowley, R.A., Pynn, R.: J. Phys. C17, L875 (1984)Google Scholar
  17. 17.
    Kötzler, J., Scheithe, W., Blickhan, R.: Solid State Commun26, 641 (1978)Google Scholar
  18. 18.
    Kötzler, J., Kamleiter, G., Weber, G.: J. Phys. C9, L361 (1976)Google Scholar
  19. 19.
    Kötzler, J., von Philipsborn, H.: Phys. Rev. Lett.40, 790 (1978)Google Scholar
  20. 20.
    Kötzler, J., Scheithe, W.: J. Magn. Magn. Mater.9, 4 (1978)Google Scholar
  21. 21.
    Dunlap, R.A., Gottlieb, A.M.: Phys. Rev. B22, 3422 (1980)Google Scholar
  22. 22.
    Hohenemser, C., Chow, L., Suter, R.M.: Phys. Rev. B26, 5056 (1982)Google Scholar
  23. 23.
    Mezei, F.: Phys. Rev. Lett.49, 1096 (1982)Google Scholar
  24. 24.
    Mezei, F.: J. Magn. Magn. Mater.45, 67 (1984)Google Scholar
  25. 25.
    Mezei, F.: Physica136B, 417 (1986)Google Scholar
  26. 26.
    Böni, P., Shirane, G.: Phys. Rev. B33, 3012 (1986)Google Scholar
  27. 27.
    Borckmans, P., Walgraef, D., Dewel, G.: Physica A91, 411 (1977)Google Scholar
  28. 28.
    Riedel, E., Wegner, F.: Phys. Rev. Lett.24, 730 (1970)Google Scholar
  29. 29.
    Bruce, A.D., Kosterlitz, J.M., Nelson, D.R.: J. Phys. C9, 825 (1976)Google Scholar
  30. 30.
    Böni, P., Shirane, G., Bohn, H.G., Zinn, W.: J. Appl. Phys.61, 8 (1987)Google Scholar
  31. 31.
    Finger, W.: Physica90B, 251 (1977)Google Scholar
  32. 32.
    Finger, W.: Phys. Lett. A60, 165 (1977)Google Scholar
  33. 33.
    Raghavan, R., Huber, D.L.: Phys. Rev. B14, 1185 (1976)Google Scholar
  34. 34.
    Frey, E., Schwabl, F., Thoma, S.: Phys. Lett. A: (to be published)Google Scholar
  35. 35.
    Santos, M.A.: J. Phys. C13, 1205 (1980)Google Scholar

Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • E. Frey
    • 1
  • F. Schwabl
    • 1
  1. 1.Institut für Theoretische PhysikPhysik-Department der Technischen Universität MünchenGarchingFederal Republic of Germany

Personalised recommendations