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

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.

References in corpus (6)

• Magnetism of iron: from the bulk to the monoatomic wire
• From the bulk to monatomic wires: An ab-initio study of magnetism in Co systems with various dimensionality
• Giant Anisotropic Magneto-Resistance in ferromagnetic atomic contacts
• Anomalous Ferromagnetism of Monatomic Co Wire at the Pt(111) Surface Step Edge
• Orbital Polarization in Itinerant Magnets
• Orbital Polarization, Surface Enhancement and Quantum Confinement in Nano-cluster Magnetism

Cited by in corpus (4)

• Electronic transport in iron atomic contacts: from the infinite wire to realistic geometries
• Orbital contribution to the magnetic properties of iron as a function of dimensionality
• Magnetocrystalline anisotropy of Fe and Co slabs and clusters on SrTiO$\_3$ by first-principles
• Giant orbital moments are responsible for the anisotropic magnetoresistance of atomic contacts