Orbital contribution to the magnetic properties of nanowires: is the orbital polarization ansatz justified?

M. C. Desjonquères, C. Barreteau (), G. Autès and D. Spanjaard

The European Physical Journal B: Condensed Matter and Complex Systems, 2007, vol. 55, issue 1, 23-27

Abstract: We show that considerable orbital magnetic moments and magneto-crystalline anisotropy energies are obtained for a Fe monatomic wire described in a tight-binding method with intra-atomic electronic interactions treated in a full Hartree Fock (HF) decoupling scheme. Even though the use of the orbital polarization ansatz with simplified Hamiltonians leads to fairly good results when the spin magnetization is saturated this is not the case of unsaturated systems. We conclude that the full HF scheme is necessary to investigate low dimensional systems. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Keywords: 75.30.Gw Magnetic anisotropy; 75.75.+a Magnetic properties of nanostructures; 75.90.+w Other topics in magnetic properties and materials (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1140/epjb/e2007-00043-5

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