Magnetic Interaction by Exchange of Field Bosons

• Authors: U. Köbler , A. Hoser
• 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

75.10.-b; 75.30.Ds

Discipline

• 75.30.Ds: Spin waves(for spin-wave resonance, see 76.50.+g)
• 75.10.-b: General theory and models of magnetic ordering(see also 05.50.+q Lattice theory and statistics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 5-6
• Pages: 1176-1178

Dates

published

2012-05

Contributors

author

U. Köbler

• Forschungszentrum Jülich, Institut für Festkörperforschung, 52425 Jülich, Germany

author

A. Hoser

• 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)

Identifiers

DOI

10.12693/APhysPolA.121.1176