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Magnetism of mixed valence (LaSr) hexaferrites

Author

Listed:
  • P. Novák
  • K. Knížek
  • M. Küpferling
  • R. Grössinger
  • M. W. Pieper

Abstract

The electronic structure of LaxSr1-xFe12O19 (x=0, 0.25, 0.5, 0.75, 1) hexaferrite is calculated using the density functional theory and generalized gradient approximation (GGA). The GGA+U method is used to improve the description of strongly correlated 3d electrons of Fe. The ‘virtual crystal’ approach is employed for the fractional x, its applicability is checked for x=0.5 by comparing it with the supercell method. The electronic charges introduced by the La substitution show no significant preference for any of the iron sublattices. The magnetic moment decreases linearly with the increasing La content in agreement with the experiment. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Suggested Citation

  • P. Novák & K. Knížek & M. Küpferling & R. Grössinger & M. W. Pieper, 2005. "Magnetism of mixed valence (LaSr) hexaferrites," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 43(4), pages 509-515, February.
    • Handle: RePEc:spr:eurphb:v:43:y:2005:i:4:p:509-515
    DOI: 10.1140/epjb/e2005-00084-8
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