The energies and life times of magnons in bulk iron and one-monolayer Fe film

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Autor/in:
Verlag/Körperschaft:
Elsevier
Erscheinungsjahr:
2010
Medientyp:
Text
Schlagworte:
  • Surface spin-wave
  • Thin iron film
  • 530: Physik
  • ddc:530
Beschreibung:
  • The dynamic magnetic susceptibility is calculated for bulk bcc iron, a supported monolayer Fe/W(1 1 0) and corresponding free standing Fe monolayer. The calculational approach is based on linear response density functional theory formulated within the framework of Korringa-Kohn-Rostoker Green's function method. The calculated susceptibilities are analyzed in terms of dispersion and damping of spin-waves. The results for bulk Fe are in good agreement with experiment and previous theoretical studies. In contrast to the bulk phase, the spin-wave excitations in thin films are well defined in the whole two-dimensional Brillouin zone. It is shown that a non-magnetic substrate changes strongly both the dispersion and damping of the spin-waves. © 2009 Elsevier B.V. All rights reserved.
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oai:reposit.haw-hamburg.de:20.500.12738/10615