Dresden 2006 – wissenschaftliches Programm

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MA: Magnetismus

MA 7: Micro- and Nanostructured Magnetic Materials I

MA 7.1: Vortrag

Montag, 27. März 2006, 15:00–15:15, HSZ 03

Electronic and Magnetic Properties of Single Cr, Triangles and Chains on W(110) — •Tim Wehling, Sergey Okatov, and Alexander Lichtenstein — I. Institut für Theoretische Physik, Universität Hamburg, Jungiusstraße 9, 20355 Hamburg

We study nano-scale systems of Cr single atoms, triangles and chains on the W(110) surface in comparison to bulk and film properties of chromium within the density functional theory. Total energy, magnetic and electronic properties as well as the crystal and the band structure of the system in question have been considered. Among the results the most interesting are the following: (i) In all the systems Cr appeared to be magnetic with µ=3.0−3.4 µ_B; (ii) The magnetic ordering of the chains strongly depends on their orientation. The type of magnetic ordering changes from antiferromagnetic (for chains along the [111]-direction) to ferromagnetic (chains along [001]) likely according to the change in the distance between the Cr atoms.