Onset of non-collinear magnetism in small Fe clusters
Instituto de Física, Universidad Autónoma de San Luis Potosí, 78000 San Luis Potosí, Mexico
2 Institut für Theoretische Physik, Universität Kassel, 34132 Kassel, Germany
Corresponding author: a firstname.lastname@example.org
Published online: 24 January 2009
The onset of noncollinear magnetism in small FeN clusters is investigated by using a rotational invariant tight-binding Hamiltonian. The ground-state local magnetic moments, magnetic order and average magnetic moments are calculated as a function of the Coulomb exchange integral J. Representative results for Fe3 and Fe5 show that the noncollinear magnetic solutions are the most stable. A variety of qualitatively different self-consistent solutions is obtained as a function of J. This includes magnetic solutions with collinear and noncollinear spin arrangements. Our calculations are compared with previous density-functional results. Extensions and limitations of our work are also pointed out.
PACS: 36.40.Cg – Electronic and magnetic properties of clusters / 75.75.+a – Magnetic properties of nanostructures / 75.10.Lp – Band and itinerant models
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009