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Magnetic and half-metallic properties of MPo (M=Ti, V, Cr, Mn, Fe) compounds

type de publication      article dans une revue internationale avec comité de lecture
date de publication 19-03-2009
auteur(s) Kahal L.; Zaoui Ali; Ferhat M.
journal (abréviation) Journal of Applied Physics (J Appl Phys)
volume (numéro) 105
numéro de papier 063905
  
résumé In this paper, we present a theoretical study of magnetic properties of MPo (M=Ti, V, Cr, Mn, Fe) compounds in the zinc-blend structure using full-potential linear augmented plane wave method. Our calculation indicates that MnPo and FePo are antiferromagnetic, whereas TiPo, VPo, and CrPo are magnetic. The ferromagnetic phase is enhanced with decreasing lattice constant and increasing atomic number along the sequence TiPo-->VPo-->CrPo. TiPo, VPo, and CrPo are predicted to be half-metal ferromagnetic with magnetic moments of 2.0µB, 3.0µB, and 4.0µB, respectively, which is confirmed from the calculated minority (majority) spin channel band structure showing the semiconducting (metallic) behavior of these compounds. The magnetism comes essentially from the d orbital of Ti, V, and Cr atoms. In addition, we have found that half-metallicity can be maintained even when spin-orbit interaction is included for TiPo and VPo. However spin-orbit effect destroys magnetism in CrPo.
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