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Ferromagnetic transition in ordered double perovskites and related alloys

Author

Listed:
  • E. Carvajal
  • O. Navarro
  • R. Allub
  • M. Avignon
  • B. Alascio

Abstract

We study the electronic and magnetic properties of ordered perovskites Sr 2 FeMO 6 (where M is a transition metal), among which some compounds, like Sr 2 FeMoO 6 are half-metallic with high Curie temperature while Sr 2 FeWO 6 is an antiferromagnetic insulator. Using a double exchange type model with an interaction between localized spins and conduction electrons together with a tight-binding Hamiltonian and the renormalized perturbation expansion method, we study the behavior of T c as a function of the number of conduction electrons and also as a function of the Fe-M energy difference. We also consider the Sr 2 FeMo x W 1-x O 6 compounds which present a magnetic and metal-insulator transition as a function of doping. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Suggested Citation

  • E. Carvajal & O. Navarro & R. Allub & M. Avignon & B. Alascio, 2005. "Ferromagnetic transition in ordered double perovskites and related alloys," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 48(2), pages 179-187, November.
    • Handle: RePEc:spr:eurphb:v:48:y:2005:i:2:p:179-187
    DOI: 10.1140/epjb/e2005-00386-9
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