PL EN


Preferences help
enabled [disable] Abstract
Number of results
2012 | 121 | 5-6 | 1176-1178
Article title

Magnetic Interaction by Exchange of Field Bosons

Authors
Content
Title variants
Languages of publication
EN
Abstracts
EN
It is shown that atomistic spin wave theory gives no correct account of the temperature dependence of the magnetic order parameter. The experimentally observed universal temperature dependence can be explained only by a field theory of magnetism. This means that instead by interacting spins (magnons) the dynamics is controlled by a boson field. The field quanta can be supposed to be magnetic density waves with dispersions that are simple power function of wave vector. This results in the observed universality. In three dimensions the field quanta have no mass and linear dispersion and cannot be observed using inelastic neutron scattering. Experiments on standing magnetic waves in thin ferromagnetic films provide direct information on the dispersion of the field quanta. A careful analysis of the available experimental data indicates that the dispersion of the field bosons is ım q, ım q^2, and ım q^{3/2} in three, two, and one dimensions.
Keywords
EN
Contributors
author
  • Forschungszentrum Jülich, Institut für Festkörperforschung, 52425 Jülich, Germany
author
  • Helmholtz-Zentrum Berlin, 14109 Berlin, Germany
References
  • 1. F. Keffer, in: Handbuch der Physik, Eds. S. Flügge, H.P.J. Wijn, Springer, Berlin 1966, p. 1
  • 2. W. Heisenberg, Z. Phys. 49, 619 (1928)
  • 3. F.J. Dyson, Phys. Rev. 102, 1230 (1956)
  • 4. U. Köbler, A. Hoser, Physica B 362, 295 (2005)
  • 5. U. Köbler, A. Hoser, Eur. Phys. J. B 60, 15 (2007)
  • 6. J.C. Le Guillou, J. Zinn-Justin, Phys. Rev. B 21, 3976 (1980)
  • 7. K.G. Wilson, J. Kogut, Phys. Rep. 12C, 75 (1974)
  • 8. J. Goldstone, A. Salam, S. Weinberg, Phys. Rev. 127, 965 (1962)
  • 9. P.E. Wigen, C.F. Kooi, M.R. Shanabarger, J. Appl. Phys. 35, 3302 (1964)
  • 10. R. Weber, IEEE Trans. Magn. MAG-4, 28 (1968)
  • 11. T.G. Phillips, H.M. Rosenberg, Phys. Rev. Lett. 11, 198 (1963)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv121n5-6p56kz
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.