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MA: Fachverband Magnetismus

MA 22: Magnetic Particles / Clusters II

MA 22.2: Vortrag

Mittwoch, 27. Februar 2008, 14:15–14:30, H 1028

Chemical ordering and magnetic properties in bimetallic transition metal clusters — •Sanjubala Sahoo, Georg Rollmann, Alfred Hucht, and Peter Entel — Physics Department, University of Duisburg-Essen, Duisburg Campus, 47048 Duisburg, Germany

Ground state properties of binary Co-Mn icosahedral clusters are studied using the density functional theory. The structural and magnetic properties are studied with respect to various compositions of the constituents. Recent experimental observation of increase in the average magnetic moment of Co-Mn clusters with increase in Mn concentration is clearly reproduced in present studies and is related to the fact that for the smaller Co-Mn clusters with a total number of atoms, N ≤ 147, the Mn atoms are preferably embedded on the surface of clusters. In addition, results on Co-Fe, Co-Ni and Fe-Mn clusters will also be presented.