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

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

2006-07-03

arxiv.org/abs/cond-mat/0607047v2

Physics

Condensed Matter

Materials Science

Scientific paper

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.

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